CV

curriculum vitae

Scott Phillip Ahrenkiel
address: Arvada, Colorado 80005
cell: 720-988-6627
e-mail: spahrenk@gmail.com

Education

Completed Dec. 1995 Ph.D., Physics, University of Colorado, Boulder, Colorado
Thesis Title: Phase Separation and Atomic Ordering in Epitaxial Semiconductor Alloys Studied by Transmission Electron Microscopy#

Completed Dec. 1991 M. S., Physics, Colorado School of Mines, Golden, Colorado
Thesis Title: Intercalation Processes in Layered Silicates and High-Tc Superconducting Oxides Studied by X-Ray Diffraction#

Completed Dec. 1987 B. S., Engineering Physics, University of Colorado, Boulder, Colorado

Employment

eQuillTech, Arvada, Colorado
Physicist/Programmer (Oct 2025-present)

I develop physics-based software inspired by my research interests and entertainment.

Big Ladder Software, Denver, Colorado
Computational Scientist (Jun 2023-Oct 2025)

My main project was development of a heat-pump-water-heater simulation library used for compliance calculations by the California Energy Commission. I generalized and restructured large segments of the code, with emphasis on physical rigor, while maintaining hundreds of unit and function tests. I implemented a formal data representation to allow external entry of manufacturer models as JSON. I added independently an interactive suite of graphical analysis apps using Plotly Dash, used to refine simulation parameters for new manufacturer models, and created a header-only library for a physical-units agnostic API.
I created a data-conversion library for users of the legacy California Utility Allowance Calculator Access databases to extract data via SQL.
I added a command-line interface and requested features to an energy-resilience simulation library, used for catastrophic analysis of large-scale installations (e.g., military bases, universities).
I formalized evaluation methods and generated documentation for a C++ interpolation library.
I developed a utility script that swaps and minimizes boost versions.

Maptek, Golden, Colorado
Software Engineer (Apr 2022-Feb 2023)

I provided maintenance on Vulcan software, fixing defects and creating unit tests, using a JIRA-based review system, with Mercurial for version control.
In response to a user story, I added the ability to import large, geo-tagged TIFF files, by expanding the extant libTIFF driver and developing a novel algorithm to generate optimized, topographical triangulations with variable resolution.

Epilog, Golden, Colorado
Laser Alignment Technician (Oct 2021-Apr 2022)

I worked in a manufacturing environment to perform alignment of new and repaired CO2 lasers for laser cutting/engraving systems.

South Dakota School of Mines and Technology, Rapid City, South Dakota
Nanoscience & Nanoengineering Ph.D. Program
Professor (Aug 2017-Jul 2021)

My group worked on the optimization of ordered, metamorphic III-V films for red/amber LEDs. We demonstrated ordered/disordered epitaxial homostructures using a plasma-enhanced MOCVD method. We measured the strength of ordering in these films by a precession-diffraction method, using automated alignment and acquistion. The patterns were refined to dynamical simulations.
Using PE-MOCVD, we demonstrated epi-Al films on GaAs substrates and control of order/disorder in III-V alloy epilayers.
I contributed to a state-wide bio-imaging center supported through NSF, and advised graduate students on TEM analysis of mutated cellular structures. My student used TEM to reconstruct localized biological features prepared by [ultramicrotomy].
I created additional special-topics courses to meet graduate-research needs.
I wrote a Digital Micrograph script manager and supporting plug-ins to improve the user experience and facilitate data archiving for the JEM-2100 transmission electron microscope, and to integrate technique automation (e.g., montaging).
I served on several academic and campus committees, including University Research, Promotion & Tenure, Risk Management, Parking Appeals.

Associate Professor (Aug 2012-Jul 2017)

In a DOE partnership support, we developed PE-MOCVD to explore synthesis at far-from-equilibrium conditions. We synthesized high-mobility epi-GaAs films on flexible metal substrates, which were proposed for multijunction III-V devices. We confronted the central challenge of defect propagation in these materials with a broad range of innovative growth experiments.
We developed a focused-jet electrospinning method for controlled synthesis of loaded polymeric nanofibers.

Assistant Professor (Aug 2006- Jul 2012)

I developed a core graduate course on nanocharacterization, and wrote a complete series of instructional experiments for that course to utilize instrumentation across campus. I taught all core courses for the program, and created elective courses on crystallography, nanomaterials, photovoltaics, and nanoelectronics. I also offered several selected topics courses in support of graduate research. I created an undergrade nanoscience course.
I managed the legacy Hitachi transmission electron microscope and trained users. I added digital acquisition capability, and facilitated and coordinated access and training for student research throughout the state. In 2009, we acquired a high-resolution JEOL TEM instrument. I oversaw the design, excavation, and renovation of specialized laboratory space for mechanical isolation of the instrument.
I supported and advised student research through a university/DOE national laboratory partnership. We modified a home-built metalorganic chemical vapor deposition system to synthesize epitaxial films of III-V compound semiconductors engineered for multi-junction photovoltaics. For over a decade, the MOCVD system was used for student research and external collaboration, with extensive hardware and software customization. The inherint risks of MOCVD demanded attention to safety protocols and development of a hazard communication system.
We developed a computational method to extract alloy compositions of alloy films from energy-dispersive X-ray spectrometry. We also applied convergent-beam electron diffraction to metamorphic alloy films, to probe both composition and strain.
I advised graduate-student research on the synthesis and characterization of metal-loaded electrospun nanofibers for photocatalysis applications.
Through a collaboration with Vinča Institute, I investigated a broad range of metal and rare-earth oxide nanomaterials.

National Renewable Energy Laboratory, Golden, Colorado
National Center for Photovoltaics
Senior Scientist I (Sep 2001-Jul 2006)

I identified the optimization criteria of compositional grades used for metamorphic, semiconductor heterostructures with world-record photovoltaic and thermophotovoltaic device efficiencies. Based on experimental investigations, I developed a detailed physical model of the relaxation behavior in the metamorphic grades that enable this technology.
I designed and constructed a tunable light source to bias tandem solar cells during testing.
My team studied the recrystallization phase-change kinetics of hydrogenated amorphous Si on glass substrates for low-cost photovoltaic applications.
I supported the NREL Bioenergy Center by imaging carbon nanotubes and cellulose fibers used as templates for nanoparticle self-assembly.
I used TEM tomography to elucidate the shapes and configurations of nanoparticles and ensembles.

Scientist II (Aug 1998-Sep 2001)

I worked closely with colloidal chemists to provide TEM characterization of semiconductor and metal nanoparticles. I supported NREL projects on various renewable-energy materials: CuInSe₂, Li:CoO₂, VO_x, BaSrTiO, and organic hybrids.
I elucidated the dark-field imaging signatures of antiphase boundaries in ordered materials, and identified unique properties and physical origins of APBs in single-variant GaInAs.

Postdoctoral Scientist (Jan 1995–Aug 1998)

I supported Basic Energy Sciences projects by using TEM to study ordered domain structures and composition modulation in epitaxial III-V semiconductor alloys and short-period superlattices. We discovered a strong nanowire formation driven by lateral modulation in short-period superlattices.
I generated theoretical models for TEM image contrast of partially ordered structures and modulated superlattices. I developed dynamical electron-diffraction software routines for experiment simulation and computational analysis of ordered structures.
I provided TEM analysis of a broad range single- and poly-crystalline thin-film materials, such as YBCO, ZnO, SiN, and Ge.

Graduate Research Assistant (Aug 1991–Dec 1995)

I enrolled in the Physics Ph.D. program at CU, Boulder, an received GRA support at NREL, to study atomic ordering phenomena in II-VI and III-V epitaxial semiconductor alloys. Spontaneous ordering has potentially useful influences on the optoelectronic properties of these materials. In collaboration with the University of Notre Dame, we discovered a novel form of composition modulation in ZnSe_1-xTe_x films that highlighted growth instabilities.

Colorado School of Mines, Golden, Colorado
Physics Department
Graduate Research Assistant (Jan 1989–Aug 1991)

I used X-ray diffraction to probe structural transitions during water intercalation in layered-silicate minerals. We applied similar methods to the copper-oxide superconductors, for which some forms also exhibit intercalation behavior.
The software to run the four-circle X-ray diffractometer was limited when I started. I wrote a programmable XRD data acquisition/analysis software package.

CERN, Geneva, Switzerland
NA36 Experiment
Summer Student (June-Aug., 1987)

I assisted with installation of a time-projection chamber used in an SPS collider experiment.
I procured and installed FASTBUS data-acquisition electronics, and wrote a test program.

Courses Instructed

SDSMT (2006-2021)

NANO 703/703L-Instrumentation for Characterization of Nanomaterials (3/1 cr): FA(06-16)#
NANO 704-Crystallography and Structure of Nanomaterials (3 cr): SP(07, 09, 11, 13, 16)#
NANO 705-Nanoelectronic Materials (3 cr): SP(09, 14, 17, 20)#
NANO 708-Nanomaterials for Photovoltaics (3 cr): SP(08, 12, 15, 18)#
NANO 401-Introduction to Nanoscience (3 cr): SP11
NANO 701-Nanomaterials (3 cr): SP10
NANO 702-Theory and Applications of Nanomaterials (3 cr): FA19
NANO 791-Ordered Semiconductors for Optoelectronics (1 cr): FA18#
NANO 791-MOCVD (1 cr): FA10
NANO 792-Defects in Nanomaterials (3 cr): SP20#

Front Range Community College

PHY 211-Calculus-Based Physics I (5 cr): FA05
PHY 212-Calculus-Based Physics II (5 cr): SP(00, 01, 04)

Community College of Denver

PHY 105-Conceptual Physics (3 cr): SP91, FA91, FA94

Special Skills and Training

Advanced transmission electron imaging and diffraction of electronic materials.
Cryo-ultramicrotome preparation and electron tomography of biomaterials.
X-ray diffraction of nanoparticles and thin films.
Dislocations and strain-relaxation analysis of epitaxial layers.
Materials and device engineering and characterization.
Semiconductor crystal growth.
Vacuum system design and maintenance.
Scientific computer programming (C++, Objective C, Swift, MatLab, LabView, Igor, Digital Micrograph, Python); IDEs: VSCode, Xcode, CLion
Experiment automation; digital image processing; computational analysis and simulation.
Machine Learning, Supervised Learning, Unsupervised Learning
Mac OS, Windows, Linux.
Technical writing proficiency.
Graduate and undergraduate teaching.

Professional Memberships

Grants Awarded

U.S. Dept. of Energy, “Non-equilibrium synthesis of epitaxial semiconductors for energy applications”, Award DE-SC0019430, 2018, $750K.#
U.S. Dept. of Energy, “Aluminum epilayers for controlled growth and processing of high-efficiency, low-cost III-V solar cells”, Award DE-EE0007363, 2016, $205K.#
U.S. Dept. of Energy, “High-Efficiency, Inexpensive Thin Film III-V Photovoltaics using Single-Crystalline Like, Flexible Substrates”, 2014, Univ. of Houston, ($400K-SDSMT).
U.S. Nat’l. Science Foundation, “MRI: Acquisition of a Modern Transmission Electron Microscope for Research and Training in South Dakota”, Award CBET-0923483, 2009, $699K.#
U.S. Dept. of Energy, “Lattice-Mismatched III-V Epilayers for High-Efficiency Photovoltaics”, 2007, $450K.
State of South Dakota, Governor’s 2010 Individual Research Seed Grant Program, “Growth Kinetics During Recrystallization of Amorphous Silicon”, 2008, $23,888.
SDSMT Council of Graduate Education, Nelson Research Grant, “Structural Characterization of Carbon and Ceramic Nanofibers”, 2008, $5000.
NREL Director’s Discretionary Research Fund, “Shape and Crystallography of III-V Semiconductor and Metal Nanoparticles”, 2004, $120K.

Book

Richard K Ahrenkiel and S Phil Ahrenkiel, Theory and methods of photovoltaic material characterization, WORLD SCIENTIFIC, 2019.#

Book Chapter

S. P. Ahrenkiel, “Diffraction and imaging of ordered semiconductors”, in A. Mascarenhas (Ed.), Spontaneous ordering in semiconductor alloys, Kluwer Academic, 2002, pp. 195–233.#

Inventions

Kirstin Alberi, Christopher Leo STENDER, and Scott Phillip AHRENKIEL, “Patent application: Strain balanced direct bandgap aluminum indium phosphide quantum wells for light emitting diodes”, (2022). #
Phil Ahrenkiel and Nathan Smaglik, “Invention disclosure: Plasma-enhanced metalorganic chemical vapor deposition of aluminum”, (2017).
Phil Ahrenkiel and Srujan Mishra, “Invention disclosure: Modified electrospinning process for controlled deposition of nanofibers by focused electric field”, (2013).
Mark W. Wanlass and S. Phillip Ahrenkiel, “Patent application: Method for achieving device-quality, lattice-mismatched, heteroepitaxial active layers”, (2006) 1–12. #

Publications

Emily S. Kessler-Lewis, Stephen J. Polly, George T. Nelson, Michael A. Slocum, Nikhil Pokharel, Phil Ahrenkiel, and Seth M. Hubbard, “Development of MOVPE grown GaSb-on-GaAs interfacial misfit solar cells”, Journal of Applied Physics 133 (2023).#
Stephen Polly, Brandon Bogner, Anastasiia Fedorenko, Nikhil Pokharel, Phil Ahrenkiel, Subhra Chowdhury, Dhrubes Biswas, and Seth Hubbard, “Growth optimization of quantum-well-enhanced multijunction photovoltaics”, Cell Reports Physical Science 4 (2023) 101432.#
Xavier Pasala, Nikhil Pokharel, Phil Ahrenkiel, Kirstin Alberi, Kamran Forghani, and Chris Stender, “Quantitative order‐parameter measurement in lattice‐mismatched AlInP using precession electron diffraction”, Journal of Microscopy 284 (2021) 132–141.#
Jinyuan Liu, Lin Kang, Ishara Ratnayake, Phil Ahrenkiel, Steve Smith, and Congzhou Wang, “Targeting cancer cell adhesion molecule, CD146, with low-dose gold nanorods and mild hyperthermia disrupts actin cytoskeleton and cancer cell migration”, Journal of Colloid and Interface Science 601 (2021) 556–569.#
Vesna Lazić, Vera Vivod, Zdenka Peršin, Milovan Stoiljković, Ishara S. Ratnayake, Phillip S. Ahrenkiel, Jovan M. Nedeljković, and Vanja Kokol, “Dextran-coated silver nanoparticles for improved barrier and controlled antimicrobial properties of nanocellulose films used in food packaging”, Food Packaging and Shelf Life 26 (2020) 100575.#
Zuzana Barbieriková, Davor Lončarević, Jelena Papan, Ivana D. Vukoje, Milovan Stoiljković, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Photocatalytic hydrogen evolution over surface-modified titanate nanotubes by 5-aminosalicylic acid decorated with silver nanoparticles”, Advanced Powder Technology 31 (2020) 4683–4690.#
Karla L. Otterpohl, Brook W. Busselman, Ishara Ratnayake, Ryan G. Hart, Kimberly R. Hart, Claire M. Evans, Carrie L. Phillips, Jordan R. Beach, Phil Ahrenkiel, Bruce A. Molitoris, Kameswaran Surendran, and Indra Chandrasekar, “Conditional Myh9 and Myh10 inactivation in adult mouse renal epithelium results in progressive kidney disease”, JCI Insight 5 (2020).#
Malini Mukherjee, Ishara Ratnayake, Madhusudhana Janga, Eric Fogarty, Shania Scheidt, Justin Grassmeyer, Jennifer deRiso, Indra Chandrasekar, Phil Ahrenkiel, Raphael Kopan, and Kameswaran Surendran, “Notch signaling regulates Akap12 expression and primary cilia length during renal tubule morphogenesis”, The FASEB Journal 34 (2020) 9512–9530.#
Nathan Smaglik, Nikhil Pokharel, and Phil Ahrenkiel, “Applications of plasma-enhanced metalorganic chemical vapor deposition”, Journal of Crystal Growth 535 (2020) 125544.#
Ram Saraswat, Ishara Ratnayake, E. Celeste Perez, William M. Schutz, Zhengtao Zhu, S. Phillip Ahrenkiel, and Scott T. Wood, “Micropatterned biphasic nanocomposite platform for maintaining chondrocyte morphology”, ACS Applied Materials & Interfaces 12 (2020) 14814–14824.#
Divya Kota, Ishara S. Ratnayake, Lin Kang, Phil Ahrenkiel, Congzhou Wang, Scott Wood, and Steve Smith, “Single molecule force spectroscopy of chondrocyte α5β1 and α1β1 integrins”, Biophysical Journal 118 (2020) 93a–94a.#
M. Miljković, V. Lazić, S. Davidović, A. Milivojević, J. Papan, M. M. Fernandes, S. Lanceros-Mendez, S. P. Ahrenkiel, and J. M. Nedeljković, “Selective antimicrobial performance of biosynthesized silver nanoparticles by horsetail extract against e. coli”, Journal of Inorganic and Organometallic Polymers and Materials 30 (2020).#
Slađana Davidović, Vesna Lazić, Miona Miljković, Milan Gordić, Milica Sekulić, Milena Marinović-Cincović, Ishara S. Ratnayake, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Antibacterial ability of immobilized silver nanoparticles in agar-agar films co-doped with magnesium ions”, Carbohydrate Polymers 224 (2019) 115187.#
Dušan K. Božanić, Gustavo A. Garcia, Laurent Nahon, Dušan Sredojević, Vesna Lazić, Ivana Vukoje, S. Phillip Ahrenkiel, Vladimir Djoković, Željko Šljivančanin, and Jovan M. Nedeljković, “Interfacial charge transfer transitions in colloidal TiO 2 nanoparticles functionalized with salicylic acid and 5-aminosalicylic acid: A comparative photoelectron spectroscopy and DFT study”, The Journal of Physical Chemistry C 123 (2019) 29057–29066.#
Marija Prekajski Đorđević, Ivana Vukoje, Vesna Lazić, Vesna Đorđević, Dušan Sredojević, Jasmina Dostanić, Davor Lončarević, S. Phillip Ahrenkiel, Milivoj R. Belić, and Jovan M. Nedeljković, “Electronic structure of surface complexes between CeO2 and benzene derivatives: A comparative experimental and DFT study”, Materials Chemistry and Physics 236 (2019) 121816.#
Nikhil Pokharel, Nathan Smaglik, Phil Ahrenkiel, Alessandro Giussani, Michael A. Slocum, and Seth M. Hubbard, “Orientations of Al4C3 and al films grown on GaAs substrates”, Materials Science in Semiconductor Processing 98 (2019) 49–54.#
Ivana D. Vukoje, Enis S. Džunuzović, Suzana Dimitrijević, Scott Phillip Ahrenkiel, and Jovan M. Nedeljković, “Size‐dependent antibacterial properties of ag nanoparticles supported by amino‐functionalized poly(GMA‐ co ‐EGDMA) polymer”, Polymer Composites 40 (2019) 2901–2907.#
Malini Mukherjee, Jennifer DeRiso, Karla Otterpohl, Ishara Ratnayake, Divya Kota, Phil Ahrenkiel, Indra Chandrasekar, and Kameswaran Surendran, “Endogenous notch signaling in adult kidneys maintains segment-specific epithelial cell types of the distal tubules and collecting ducts to ensure water homeostasis”, Journal of the American Society of Nephrology 30 (2019) 110–126.#
Vesna Lazić, Katarina Mihajlovski, Ana Mraković, Erzsébet Illés, Milovan Stoiljković, S. Phil Ahrenkiel, and Jovan M. Nedeljković, “Antimicrobial activity of silver nanoparticles supported by magnetite”, Chemistry Select 4 (2019) 1–8.#
Geemin Kim, Sol An, Seok Ki Hyeong, Seoung Ki Lee, Myungwoong Kim, and Naechul Shin, “Perovskite pattern formation by chemical vapor deposition using photolithographically defined templates”, Chemistry of Materials 31 (2019) 8212–8221.#
J. Milikić, U. Stamenović, V. Vodnik, S. P. Ahrenkiel, and B. Šljukić, “Gold nanorod-polyaniline composites: Synthesis and evaluation as anode electrocatalysts for direct borohydride fuel cells”, Electrochimica Acta 328 (2019).#
Sudersena Rao Tatavarti, Zachary S. Bittner, A. Wibowo, Michael A. Slocum, George Nelson, Hyun Kum, S. Phillip Ahrenkiel, and Seth M. Hubbard, “Epitaxial lift-off (ELO) of InGaP/GaAs/InGaAs solar cells with quantum dots in GaAs middle sub-cell”, Solar Energy Materials and Solar Cells 185 (2018) 153–157.#
Anurag Chakraborty, Robert Anderson, Scott P. Ahrenkiel, Frank Kustas, and Jason Ash, “Numerical estimation of intrinsic stress in physical vapor deposited thin-films”, Surface and Coatings Technology 350 (2018) 488–495.#
Vesna Lazić, Ivana Smičiklas, Jelena Marković, Davor Lončarević, Jasmina Dostanić, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Antibacterial ability of supported silver nanoparticles by functionalized hydroxyapatite with 5-aminosalicylic acid”, Vacuum 148 (2018) 62–68.#
Yongkuan Li, Haichao Guo, Yao Yao, Pavel Dutta, Monika Rathi, Nan Zheng, Ying Gao, Sicong Sun, Jae-Hyun Ryou, Phil Ahrenkiel, and Venkat Selvamanickam, “Defect reduction by liquid phase epitaxy of germanium on single-crystalline-like germanium templates on flexible, low-cost metal substrates”, CrystEngComm 20 (2018) 6573–6579.#
M. V. Carević, N. D. Abazović, M. N. Mitrić, G. Ćirić-Marjanović, M. D. Mojović, S. P. Ahrenkiel, and M. I. Čomor, “Properties of zirconia/polyaniline hybrid nanocomposites and their application as photocatalysts for degradation of model pollutants”, Materials Chemistry and Physics 205 (2018) 130–137.#
Bojana Milićević, Vesna Đorđević, Davor Lončarević, Jasmina M. Dostanić, S. Phillip Ahrenkiel, Miroslav D. Dramićanin, Dušan Sredojević, Nenad M. Švrakić, and Jovan M. Nedeljković, “Charge-transfer complex formation between TiO2 nanoparticles and thiosalicylic acid: A comprehensive experimental and DFT study”, Optical Materials 73 (2017) 163–171.#
Marija Radoičić, Gordana Ćirić-Marjanović, Vuk Spasojević, Phil Ahrenkiel, Miodrag Mitrić, Tatjana Novaković, and Zoran Šaponjić, “Superior photocatalytic properties of carbonized PANI/TiO2 nanocomposites”, Applied Catalysis B: Environmental 213 (2017) 155–166.#
Ivana Smičiklas, Jelena Papan, Vesna Lazić, Davor Lončarević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Functionalized biogenic hydroxyapatite with 5-aminosalicylic acid – sorbent for efficient separation of Pb2+ and Cu2+ ions”, Journal of Environmental Chemical Engineering 5 (2017) 3759–3765.#
Nan Zheng and S. Phillip Ahrenkiel, “Epitaxial nanowire formation in metamorphic GaAs/GaPAs short-period superlattices”, AIP Advances 7 (2017).#
Vladan Bajić, Biljana Spremo-Potparević, Lada Živković, Andrea Čabarkapa, Jelena Kotur-Stevuljević, Esma Isenović, Dušan Sredojević, Ivana Vukoje, Vesna Lazić, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Surface-modified TiO2 nanoparticles with ascorbic acid: Antioxidant properties and efficiency against DNA damage in vitro”, Colloids and Surfaces B: Biointerfaces 155 (2017) 323–331.#
I Ratnayake, S. P. Ahrenkiel, A. Hoppe, and N. Thiex, “Electron microscopy and tomography on endocytosis of macrophages”, Microscopy and Microanalysis 23 (2017) 1268–1269.#
Ivana D. Vukoje, Enis S. Džunuzović, Davor R. Lončarević, Suzana Dimitrijević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Synthesis, characterization, and antimicrobial activity of silver nanoparticles on poly(GMA‐ co ‐EGDMA) polymer support”, Polymer Composites 38 (2017) 1206–1214.#
Jasmina Dostanić, Davor Lončarević, Vesna Đorđević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “The photocatalytic performance of silver halides – silver carbonate heterostructures”, Journal of Photochemistry and Photobiology A: Chemistry 336 (2017) 1–7.#
Milica V. Carević, Tatjana D. Savić, Nadica D. Abazović, Miodrag N. Mitrić, Zoran A. Stojanović, Scott P. Ahrenkiel, and Mirjana I. Čomor, “Formation of ZnIn2S4 nanosheets and tubular structures in organic media”, Materials Research Bulletin 87 (2017) 140–147.#
Ivana D. Vukoje, Enis S. Dzunuzović, Davor R. Loncarević, Suzana Dimitrijević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Synthesis, characterization, and antimicrobial activity of silver nanoparticles on poly(GMA-co-EGDMA) polymer support”, Polymer Composites 2017 (2017) 1206.#
Gordana Bogdanovic, Tijana Kovac, Enis Dzunuzovic, Milena Spírková, Phillip Ahrenkiel, and Jovan Nedeljkovic, “Influence of hematite nanorods on the mechanical properties of epoxy resin”, Journal of the Serbian Chemical Society 82 (2017) 437–447.#
Vesna Ðorđević, Jasmina Dostanić, Davor Lončarević, S. Phillip Ahrenkiel, Dušan N. Sredojević, Nenad Švrakić, Milivoj Belić, and Jovan M. Nedeljković, “Hybrid visible-light responsive Al2O3 particles”, Chemical Physics Letters 685 (2017) 416–421.#
J. Papan, K. Vuković, S. P. Ahrenkiel, D. J. Jovanović, and M. D. Dramićanin, “Detailed study of structural and luminescent properties of y2-xeuxzr2o7 (0 ≤ x ≤ 1) nanophosphors”, Journal of Alloys and Compounds 712 (2017).#
Sanja Ćulubrk, Vesna Lojpur, Scott P. Ahrenkiel, Jovan M. Nedeljković, and Miroslav D. Dramićanin, “Non-contact thermometry with Dy3+ doped Gd2Ti2O7 nano-powders”, Journal of Luminescence 170 (2016) 395–400.#
Mark W. Wanlass, Scott P. Ahrenkiel, Jeffrey J. Carapella, Daniel J. Friedman, Carl R. Osterwald, and Manuel Romero, “Progress toward an advanced four-subcell inverted metamorphic multi-junction (IMM) solar cell”, Progress in Photovoltaics: Research and Applications 24 (2016) 139–149.#
Ivana Vukoje, Tijana Kovač, Jasna Džunuzović, Enis Džunuzović, Davor Lončarević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Photocatalytic ability of visible-light-responsive TiO2 nanoparticles”, The Journal of Physical Chemistry C 120 (2016) 18560–18569.#
M. Vranješ, J. Kuljanin-Jakovljević, Z. Konstantinović, A. Pomar, S. P. Ahrenkiel, T. Radetić, M. Stoiljković, M. Mitrić, and Z. Šaponjić, “Room temperature ferromagnetism in cu2+ doped TiO2 nanocrystals: The impact of their size, shape and dopant concentration”, Materials Research Bulletin 76 (2016).#
B. Milićević, V. Đorđević, D. Lončarević, S. P. Ahrenkiel, M. D. Dramićanin, and J. M. Nedeljković, “Visible light absorption of surface modified TiO2 powders with bidentate benzene derivatives”, Microporous and Mesoporous Materials 217 (2015) 184–189.
Ivana D. Vukoje, Enis S. Džunuzović, Suzana Dimitrijević Davor R. Lončarević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Synthesis, characterization, and antimicrobial activity of silver nanoparticles on poly(GMA-co-EGDMA) polymer support”, Polymer Composites (2015).
I. L. Validžić, M. Mitrić, S. P. Ahrenkiel, and M. I. Čomor, “Microstructural analysis and the multicolor UV/violet/blue/green/yellow PL observed from the synthesized ZnO nano-leaves and nano-rods”, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 46 (2015).#
B. Milićević, V. Doradević, D. Lončarević, S. P. Ahrenkiel, M. D. Dramićanin, and J. M. Nedeljković, “Visible light absorption of surface modified TiO<inf>2</inf> powders with bidentate benzene derivatives”, Microporous and Mesoporous Materials 217 (2015).#
U. Bogdanović, I. Pašti, G. Ćirić-Marjanović, M. Mitrić, S. P. Ahrenkiel, and V. Vodnik, “Interfacial synthesis of gold-polyaniline nanocomposite and its electrocatalytic application”, ACS Applied Materials and Interfaces 7 (2015).#
Vesna Lojpur, Scott P. Ahrenkiel, and Miroslav D. Dramićanin, “Yb3+, Er3+ doped Y2O3 nanoparticles of different shapes prepared by self-propagating room temperature reaction method”, Ceramics International 40 (2014) 16033–16039.#
M D Dramićanin, Ž Antić, S Ćulubrk, S P Ahrenkiel, and J M Nedeljković, “Self-referenced luminescence thermometry with sm 3+ doped TiO 2 nanoparticles”, Nanotechnology 25 (2014) 485501.#
Ivana D. Vukoje, Enis S. Džunuzović, Vesna V. Vodnik, Suzana Dimitrijević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Synthesis, characterization, and antimicrobial activity of poly(GMA-co-EGDMA) polymer decorated with silver nanoparticles”, Journal of Materials Science 49 (2014) 6838–6844.#
Željka Antić, Vesna Lojpur, Marko G. Nikolić, Vesna Đorđević, S. Phillip Ahrenkiel, and Miroslav D. Dramićanin, “Strong emission via up-conversion of Gd2O3:Yb3+, Ho3+ nanopowders co-doped with alkali metals ions”, Journal of Luminescence 145 (2014) 466–472.#
Ivana D. Vukoje, Enis S. Džunuzović, Vesna V. Vodnik, Suzana Dimitrijević, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Synthesis, characterization, and antimicrobial activity of poly(GMA-co-EGDMA) polymer decorated with silver nanoparticles”, Journal of Materials Science 49 (2014) 6838–6844.
U. Bogdanović, V. V. Vodnik, S. P. Ahrenkiel, M. Stoiljković, G. Ćirić-Marjanović, and J. M. Nedeljković, “Interfacial synthesis and characterization of gold/polyaniline nanocomposites”, Synthetic Metals 195 (2014).#
Vesna M Lojpur, Phillip S Ahrenkiel, and Miroslav D Dramićanin, “Color-tunable up-conversion emission in Y2O3:Yb3+, Er3+ nanoparticles prepared by polymer complex solution method”, Nanoscale Research Letters 8 (2013) 131.#
Milica V. Beloš, Nadica D. Abazović, Jadranka Kuljanin Jakovljević, Ivana Janković, Scott P. Ahrenkiel, Miodrag Mitrić, and Mirjana I. Čomor, “Influence of sulphide precursor on crystal phase of ternary i–III–VI2 semiconductors”, Journal of Nanoparticle Research 15 (2013) 2148.#
Mitchell F. Bennett, Zachary S. Bittner, David V. Forbes, Sudersena Rao Tatavarti, S. Phillip Ahrenkiel, Andree Wibowo, Noren Pan, Kevin Chern, and Seth M. Hubbard, “Epitaxial lift-off of quantum dot enhanced GaAs single junction solar cells”, Applied Physics Letters 103 (2013) 213902.#
M. Vranješ, J. Kuljanin-Jakovljević, S. P. Ahrenkiel, I. Zeković, M. Mitrić, Z. Šaponjić, and J. M. Nedeljković, “Sm3+ doped TiO2 nanoparticles synthesized from nanotubular precursors—luminescent and structural properties”, Journal of Luminescence 143 (2013) 453–458.#
Sreenivasan Koliyat Parayil, Harrison S. Kibombo, Chia-Ming Wu, Rui Peng, Trevor Kindle, Srujan Mishra, S. Phil Ahrenkiel, Jonas Baltrusaitis, Nada M. Dimitrijevic, Tijana Rajh, and Ranjit T. Koodali, “Synthesis-dependent oxidation state of platinum on TiO 2 and their influences on the solar simulated photocatalytic hydrogen production from water”, The Journal of Physical Chemistry C 117 (2013) 16850–16862.#
Luís Pinho and Maria J. Mosquera, “Photocatalytic activity of TiO2–SiO2 nanocomposites applied to buildings: Influence of particle size and loading”, Applied Catalysis B: Environmental 134-135 (2013) 205–221.#
Chia-Ming Wu, Monika Rathi, S. Phil Ahrenkiel, Ranjit T. Koodali, and Zhenqiang Wang, “Facile synthesis of MOF-5 confined in SBA-15 hybrid material with enhanced hydrostability”, Chemical Communications 49 (2013) 1223.#
Monika Rathi, S. P. Ahrenkiel, J. J. Carapella, and M. W. Wanlass, “A standards-based method for compositional analysis by energy dispersive x-ray spectrometry using multivariate statistical analysis: Application to multicomponent alloys”, Microscopy and Microanalysis 19 (2013) 66–72.#
Ivana Lj. Validžić, Nadica D. Abazović, S. Phillip Ahrenkiel, and Ivana A. Janković, “Structural and morphological dependences of Sb2S3 nanobars synthesised by organo-colloidal process on precursor concentrations and reaction times”, Journal of Crystal Growth 354 (2012) 157–163.#
Srujan Mishra and S. Phillip Ahrenkiel, “Synthesis and characterization of electrospun nanocomposite TiO 2 nanofibers with ag nanoparticles for photocatalysis applications”, Journal of Nanomaterials 2012 (2012) 902491.#
Nadica Abazovic, Dragana Jovanovic, Milovan Stoiljkovic, Miodrag Mitric, Phillip Ahrenkil, Jovan Nedeljkovic, and Mirjana Comor, “Colloidal-chemistry based synthesis of quantized CuInS2/Se2 nanoparticles”, Journal of the Serbian Chemical Society 77 (2012) 789–797.#
M. A. Abid, H. Abu Hassan, Z. Hassan, S. S. Ng, S. K. Mohd Bakhori, and N. H.Abd. Raof, “Characterization of AlxInyGa1−x−yN quaternary alloys grown on sapphire substrates by molecular-beam epitaxy”, Materials Science in Semiconductor Processing 14 (2011) 164–169.#
S. P. Ahrenkiel, A. H. Mahan, D. S. Ginley, and Y. Xu, “Solid-phase crystallization kinetics and grain structure during thermal annealing of a-si:h grown by chemical vapor deposition”, Materials Science and Engineering B: Solid-State Materials for Advanced Technology 176 (2011).#
R. France, A. J. Ptak, C.-S. Jiang, and S. P. Ahrenkiel, “Control of asymmetric strain relaxation in InGaAs grown by molecular-beam epitaxy”, Journal of Applied Physics 107 (2010) 103530.#
A. Harv Mahan, Tining Su, Don L. Williamson, Lynn M. Gedvilas, S. Phil Ahrenkiel, Phillip A. Parilla, Yueqin Xu, and David A. Ginley, “Identification of nucleation center sites in thermally annealed hydrogenated amorphous silicon”, Advanced Functional Materials 19 (2009) 2338–2344.#
Qi Xu, Melvin P. Tucker, Phil Arenkiel, Xin Ai, Garry Rumbles, Junji Sugiyama, Michael E. Himmel, and Shi-You Ding, “Labeling the planar face of crystalline cellulose using quantum dots directed by type-i carbohydrate-binding modules”, Cellulose 16 (2009) 19–26.#
J. C. Johnson, S. P. Ahrenkiel, P. Dutta, and V. R. Bommisetty, “Nucleation and growth of crystalline grains in RF-sputtered TiO2 films”, Journal of Nanotechnology 2009 (2009) 1–4.#
Banasri Roy, Scott P. Ahrenkiel, and Paul Anton Fuierer, “Controlling the size and morphology of TiO 2 powder by molten and solid salt synthesis”, Journal of the American Ceramic Society 91 (2008) 2455–2463.#
S. P. AHRENKIEL, P. R. YU, J. E. MURPHY, J. M. NEDELJKOVIĆ, and B. S. DONOHOE, “Nanoparticle shape and configuration analysis by transmission electron tomography”, Journal of Microscopy 230 (2008) 382–387.#
M. S. Dabney, M. F. A. M. Vanhest, C. W. Teplin, S. P. Ahrenkiel, J D. Perkins, and D. S. Ginley, “Pulsed laser deposited nb doped TiO2 as a transparent conducting oxide”, Thin Solid Films 516 (2008) 4133–4138.#
C. H. Swartz, S. M. Durbin, P. A. Anderson, D. Carder, R. J. Reeves, S. Chandril, T. H. Myers, V. J. Kennedy, and S. P. Ahrenkiel, “Mg doping of InN and the use of yttrium‐stabilised zirconia substrates”, Physica Status Solidi c 5 (2008) 508–510.#
Y. Zhang, Z. Islam, Y. Ren, P. A. Parilla, S. P. Ahrenkiel, P. L. Lee, A. Mascarenhas, M. J. McNevin, I. Naumov, H.-X. Fu, X.-Y. Huang, and J. Li, “Zero thermal expansion in a nanostructured inorganic-organic hybrid crystal”, Physical Review Letters 99 (2007) 1–4.#
S. P. Ahrenkiel, M. W. Wanlass, J. J. Carapella, R. K. Ahrenkiel, S. W. Johnston, and L. M. Gedvilas, “Optimization of buffer layers for lattice-mismatched epitaxy of GaxIn1−xAs/InAsyP1−y double-heterostructures on InP”, Solar Energy Materials and Solar Cells 91 (2007) 908–918.#
Nadica D. Abazović, Mirjana I. Čomor, Miroslav D. Dramićanin, Dragana J. Jovanović, S. Phillip Ahrenkiel, and Jovan M. Nedeljković, “Photoluminescence of anatase and rutile TiO 2 particles”, The Journal of Physical Chemistry B 110 (2006) 25366–25370.#
Chaiwat Engtrakul, Yong-Hyun Kim, Jovan M. Nedeljković, S. Phil Ahrenkiel, Katherine E. H. Gilbert, Jeff L. Alleman, S. B. Zhang, Olga I. Mićić, Arthur J. Nozik, and Michael J. Heben, “Self-assembly of linear arrays of semiconductor nanoparticles on carbon single-walled nanotubes”, The Journal of Physical Chemistry B 110 (2006) 25153–25157.#
A. H. Mahan, S. P. Ahrenkiel, B. Roy, R. E. I. Schropp, H. Li, and D. Ginley, “On the effect of the film hydrogen content and deposition type on the grain nucleation and grain growth during crystallization of a-si:h films”, in: 2006 IEEE 4th World Conference on Photovoltaic Energy Conference, IEEE, 2006, pp. 1612–1615.#
J. E. Murphy, M. C. Beard, A. G. Norman, S. P. Ahrenkiel, J. C. Johnson, P. Yu, O. I. Mićić, R. J. Ellingson, and A. J. Nozik, “PbTe colloidal nanocrystals: Synthesis, characterization, and multiple exciton generation”, Journal of the American Chemical Society 128 (2006).#
Jun Feng, Alex Miedaner, Phil Ahrenkiel, Michael E. Himmel, Calvin Curtis, and David Ginley, “Self-assembly of photoactive TiO 2 −cyclodextrin wires”, Journal of the American Chemical Society 127 (2005) 14968–14969.#
J. M. Nedeljković, O. I. Mićić, S. P. Ahrenkiel, and A. J. Nozik, “Synthesis and characterization of III-v rod shape semiconductor nanocrystals”, Materials Science Forum 494 (2005) 121.#
Jovan M Nedeljković, Olga I Mićić, S Phillip Ahrenkiel, Alex Miedaner, and Arthur J Nozik, “Growth of InP nanostructures via reaction of indium droplets with phosphide ions: Synthesis of InP quantum rods and InP-TiO2 composites.”, Journal of the American Chemical Society 126 (2004) 2632–9.#
S. P. Ahrenkiel, M. W. Wanlass, J. J. Carapella, L. M. Gedvilas, B. M. Keyes, R. K. Ahrenkiel, and H. R. Moutinho, “Characterization survey of GaxIn1−xAs/InAsyP1−y double heterostructures and InAsyP1−y multilayers grown on InP”, Journal of Electronic Materials 33 (2004) 185–193.#
C. Engtrakul, J. M. Nedeljkovic, Y.-H. Kim, S. P. Ahrenkiel, K. E. H. Gilbert, J. L. Alleman, S. B. Zhang, O. I. Micic, A. J. Nozik, and M. J. Heben, “Self-organization of semiconductor quantum nanocrystals on carbon single-wall nanotubes into close-packed linear arrays”, in: Materials Research Society Symposium - Proceedings, 2004, p. HH12.6.#
R. J. Wehrer, “0.52 eV InGaAs/InPAs thermophotovoltaic cells”, in: A. Gopinath, T.J. Coutts, and J. Luther (Eds.), AIP Conference Proceedings, AIP, 2004, pp. 445–452.#
S. Smith, A. Mascarenhas, S. P. Ahrenkiel, M. C. Hanna, and J. M. Olson, “Spatially resolved below-gap emission in partially ordered <math display=”inline”> <mrow> <msub> <mrow> <mi mathvariant=”normal”>ga</mi> </mrow> <mrow> <mi>x</mi> </mrow> </msub> </mrow> <mrow> <msub> <mrow> <mi mathvariant=”normal”>in</mi> </mrow> <mrow> <mn>1</mn> <mi>−</mi> <mi>x</mi> </mrow> </msub> </mrow> <mi mathvariant=”normal”>p</mi> </math> alloys”, Physical Review B 68 (2003) 035310.#
B. J. Stanbery, S. Kincal, S. Kim, C. H. Chang, S. P. Ahrenkiel, G. Lippold, H. Neumann, T. J. Anderson, and O. D. Crisalle, “Epitaxial growth and characterization of CuInSe2 crystallographic polytypes”, Journal of Applied Physics 91 (2002) 3598–3604.#
Olga I. Mićić, S. P. Ahrenkiel, and Arthur J. Nozik, “Synthesis of extremely small InP quantum dots and electronic coupling in their disordered solid films”, Applied Physics Letters 78 (2001) 4022–4024.#
J. H. Li, J. Kulik, V. Holý, Z. Zhong, S. C. Moss, Y. Zhang, S. P. Ahrenkiel, A. Mascarenhas, and Jianming Bai, “X-ray diffraction from CuPt-ordered III-v ternary semiconductor alloy films”, Physical Review B 63 (2001) 155310.#
S. P. Ahrenkiel and M. C. Hanna, “Antiphase-boundary extension in single-variant CuPt–b ordered ga0.47in0.53as on InP”, Applied Physics Letters 79 (2001) 1781.#
S. R. Lee, J. Mirecki Millunchick, R. D. Twesten, D. M. Follstaedt, J. L. Reno, S. P. Ahrenkiel, and A. G. Norman, “Reciprocal-space analysis of compositional modulation in short-period superlattices using position-sensitive x-ray detection”, Journal of Materials Science: Materials in Electronics 10 (1999) 191–197.#
A. G. Norman, S. P. Ahrenkiel, H. R. Moutinho, C. Ballif, M. M. Al-Jassim, A. Mascarenhas, D. M. Follstaedt, S. R. Lee, J. L. Reno, E. D. Jones, J. Mirecki-Millunchick, and R. D. Twesten, “The nature and origin of lateral composition modulations in short-period strained-layer superlattices”, in: MRS Proceedings, 1999, p. 297.#
S. J. Pennycook, Y. Yan, A. Norman, Y. Zhang, M. Al-Jassim, A. Mascarenhas, S. P. Ahrenkiel, M. F. Chisholm, G. Duscher, and S. T. Pantelides, “Atomic-resolution z-contrast imaging and its application to compositional ordering and segregation”, in: MRS Proceedings, 1999, p. 235.#
O. I. Mićić, S. P. Ahrenkiel, D. Bertram, and A. J. Nozik, “Synthesis, structure, and optical properties of colloidal GaN quantum dots”, Applied Physics Letters 75 (1999) 478–480.#
S. P. Ahrenkiel, S. W. Johnston, R. K. Ahrenkiel, D. J. Arent, M. C. Hanna, and M. W. Wanlass, “Atomic ordering and temperature-dependent transient photoconductivity in ga0.47in0.53as”, Applied Physics Letters 74 (1999) 3534.#
Hyeonsik M. Cheong, S. Phillip Ahrenkiel, Mark C. Hanna, and Angelo Mascarenhas, “Phonon signatures of spontaneous CuPt ordering in Ga0.47In0.53As/InP”, Applied Physics Letters 73 (1998) 2648–2650.#
A. G. Norman, S. P. Ahrenkiel, H. Moutinho, M. M. Al-Jassim, A. Mascarenhas, J. Mirecki Millunchick, S. R. Lee, R. D. Twesten, D. M. Follstaedt, J. L. Reno, and E. D. Jones, “Strain-dependent morphology of spontaneous lateral composition modulations in (AlAs)m(InAs)n short-period superlattices grown by molecular beam epitaxy”, Applied Physics Letters 73 (1998) 1844–1846.#
D. M Follstaedt, R. D Twesten, J Mirecki Millunchick, S. R Lee, E. D Jones, S. P Ahrenkiel, Y Zhang, and A Mascarenhas, “Spontaneous lateral composition modulation in InAlAs and InGaAs short-period superlattices”, Physica E: Low-Dimensional Systems and Nanostructures 2 (1998) 325–329.#
S. P. Ahrenkiel, A. G. Norman, M. M. Al-Jassim, A. Mascarenhas, J. Mirecki-Millunchick, R. D. Twesten, S. R. Lee, D. M. Follstaedt, and E. D. Jones, “Laterally modulated composition profiles in AlAs/InAs short-period superlattices”, Journal of Applied Physics 84 (1998) 6088.#
J. Mirecki Millunchick, R. D. Twesten, S. R. Lee, D. M. Follstaedt, E. D. Jones, S. P. Ahrenkiel, Y. Zhang, H. M. Cheong, and A. Mascarenhas, “Spontaneous lateral composition modulation in III-v semiconductor alloys”, MRS Bulletin 22 (1997) 38–43.#
R. K. Ahrenkiel, S. P. Ahrenkiel, D. J. Arent, and J. M. Olson, “Carrier transport in ordered and disordered In0.53Ga0.47As”, Applied Physics Letters 70 (1997) 756–758.#
J. M. Millunchick, R. D. Twesten, S. R. Lee, D. M. Follstaedt, E. D. Jones, S. P. Ahrenkiel, Y. Zhang, H. M. Cheong, and A. Mascarenhas, “Spontaneous lateral composition modulation in AlAs/InAs short period superlattices via the growth front”, Journal of Electronic Materials 26 (1997) 1048–1052.
S. P. Ahrenkiel, S. H. Xin, P. M. Reimer, J. J. Berry, H. Luo, S. Short, M. Bode, M. Al-Jassim, J. R. Buschert, and J. K. Furdyna, “Self-organized formation of compositionally modulated ZnSe1-xTex superlattices”, Physical Review Letters 75 (1995) 1586–1589.#
S. P. Ahrenkiel, M. H. Bode, M. M. Al-Jassim, H. Luo, S. H. Xin, and J. K. Furdyna, “Microcharacterization of composition modulations in epitaxial ZnSe1-xTex”, Journal of Electronic Materials 24 (1995) 319–325.#
H. Luo, N. Samarth, S. W. Short, S. H. Xin, J. K. Furdyna, P. Ahrenkiel, M. H. Bode, and M. M. Al-Jassim, “First indications of spontaneous ordering in ZnSe0.50Te0.50 alloy”, Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena 12 (1994) 1140–1142.#
C. H. Qiu, S. P. Ahrenkiel, N. Wada, and T. F. Ciszek, “X-ray diffraction and high-pressure raman scattering study of iodine-intercalated Bi2Sr2CaCu2O8+x”, Physica C: Superconductivity 185-189 (1991) 825–826.#
N. Wada, D. R. Hines, and S. P. Ahrenkiel, “X-ray-diffraction studies of hydration transitions in na vermiculite”, Physical Review B 41 (1990) 12895–12901.#

Proceedings

Phil Ahrenkiel, Nathan Smaglik, Nikhil Pokharel, Alessandro Giussani, Michael A. Slocum, and Seth M. Hubbard, “Development of aluminum epilayers as buffers for GaInAs”, in: Conference Record of the IEEE Photovoltaic Specialists Conference, IEEE, 2017, pp. 831–836.#
Alessandro Giussani, Michael A. Slocum, Seth M. Hubbard, Nathan Smaglik, Nikhil Pokharel, and S. Phillip Ahrenkiel, “Integration of thin al films on in 0.18 ga 0.82 as metamorphic grade structures for low-cost III- v photovoltaics”, in: 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC), IEEE, 2017, pp. 2514–2519.#
Mark W. Wanlass, Scott P. Ahrenkiel, Jeffrey J. Carapella, Daniel J. Friedman, Carl R. Osterwald, and Manuel Romero, “Progress toward an advanced four-subcell inverted metamorphic multi-junction (IMM) solar cell”, Progress in Photovoltaics: Research and Applications 24 (2016) 139–149.#
Phil Ahrenkiel, Nan Zheng, and Joseph Street, “Growth and characterization of GaAs/GaPAs metamorphic, epitaxial nanostructures”, in: 2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), IEEE, 2014, pp. 2862–2864.#
Monika Rathi, S. P. Ahrenkiel, J. J. Carapella, and M. W. Wanlass, “A standards-based method for compositional analysis by energy dispersive x-ray spectrometry using multivariate statistical analysis: Application to multicomponent alloys”, Microscopy and Microanalysis 19 (2013) 66–72.#
S. P. Ahrenkiel, M. Rathi, R. Nesheim, N. Zheng, S. Vunnam, J. J. Carapella, and M. W. Wanlass, “Compositional and structural characterization by TEM of lattice-mismatched III-v epilayers”, in: 2011 37th IEEE Photovoltaic Specialists Conference, IEEE, 2011, pp. 000449–000451.#
M. Rathi, S. P. Ahrenkiel, J. J. Carapella, M. W. Wanlass, and M. Steiner, “Structure and composition of lattice-mismatched III–v epilayers for high-efficiency photovoltaics”, in: 2010 35th IEEE Photovoltaic Specialists Conference, IEEE, 2010, pp. 002097–002101.#
S. P. Ahrenkiel, B. Roy, A. H. Mahan, and D. S. Ginley, “Grain nucleation and grain growth during crystallization of HWCVD a-si:h films”, Materials Research Society Symposium Proceedings 910 (2006) 0910-A07-05.#
A. H. Mahan, S. P. Ahrenkiel, B. Roy, R. E. I. Schropp, H. Li, and D. Ginley, “On the effect of the film hydrogen content and deposition type on the grain nucleation and grain growth during crystallization of a-si:h films”, in: 2006 IEEE 4th World Conference on Photovoltaic Energy Conference, IEEE, 2006, pp. 1612–1615.#
M. W. Wanlass, S. P. Ahrenkiel, R. K. Ahrenkiel, D. S. Albin, J. J. Carapella, A. Duda, J. F. Geisz, S. Kurtz, T. Moriarty, R. J. Wehrer, and B. Wernsman, “Lattice-mismatched approaches for high-performance, III-v photovoltaic energy converters”, in: Conference Record of the IEEE Photovoltaic Specialists Conference, 2005. #
C. Engtrakul, J. M. Nedeljkovic, Y.-H. Kim, S. P. Ahrenkiel, K. E. H. Gilbert, J. L. Alleman, S. B. Zhang, O. I. Micic, A. J. Nozik, and M. J. Heben, “Self-organization of semiconductor quantum nanocrystals on carbon single-wall nanotubes into close-packed linear arrays”, in: Materials Research Society Symposium - Proceedings, 2004, p. HH12.6.#
C.-H. Chang, Su-Huai Wei, S. P. Ahrenkiel, J. W. Johnson, B. J. Stanbery, T. J. Anderson, S. B Zhang, M. M. Al-Jassim, G. Bunker, E. A. Payzant, and R. Duran, “Structure investigations of several in-rich (cu 2 se) x (in 2 se 3 ) 1−x compositions: From local structure to long range order”, in: MRS Proceedings, 2001, p. H4.3.#
S. P. Ahrenkiel, K. M. Jones, R. J. Matson, M. M. Al-Jassim, Y. Zhang, A. Mascarenhas, D. J. Friedman, D. J. Arent, J. M. Olson, and M. C. Hanna, “CuPt-b ordered microstructures in GaInP and GaInAs films”, in: Materials Research Society Fall Meeting, 2000, pp. 243–248. #
B. J. Stanbery, S. Kincal, S. Kim, T. J. Anderson, O. D. Crisalle, S. P. Ahrenkiel, and G. Lippold, “Role of sodium in the control of defect structures in CIS [solar cells]”, in: Conference Record of the Twenty-Eighth IEEE Photovoltaic Specialists Conference - 2000 (Cat. No.00CH37036), IEEE, 2000, pp. 440–445.#
S. P. Ahrenkiel, K. M. Jones, R. J. Maison, M. M. Al-Jassim, Y. Zhang, A. Mascarenhas, D. J. Friedman, D. J. Arent, J. M. Olson, and M. C. Hanna, “CuPt-b ordered microstructures in GalnP and GalnAs films”, in: Materials Research Society Symposium - Proceedings, 2000, pp. 243–248. #
A. G. Norman, S. P. Ahrenkiel, H. R. Moutinho, C. Ballif, M. M. Al-Jassim, A. Mascarenhas, D. M. Follstaedt, S. R. Lee, J. L. Reno, E. D. Jones, J. Mirecki-Millunchick, and R. D. Twesten, “The nature and origin of lateral composition modulations in short-period strained-layer superlattices”, in: MRS Proceedings, 1999, p. 297.#
Yong Zhang, B. Fluegel, S. P. Ahrenkiel, D. J. Friedman, J. F. Geisz, J. M. Olson, and A. Mascarenhas, “Electronic and optical properties of orientational superlattices in gainp alloys”, in: MRS Proceedings, 1999, p. 255.#
D. M. Follstaedt, S. R. Lee, J. L. Reno, E. D. Jones, R. D. Twesten, A. G. Norman, S. P. Ahrenkiel, H. R. Moutinho, A. Mascarenhas, and J. Mirecki Millunchick, “Reciprocal-space and real-space analyses of compositional modulation in InAs/AlAs short-period superlattices”, in: A. Mascarenhas, D. Follstaedt, T. Suzuki, and B. Joyce (Eds.), MRS Proceedings, 1999, p. 333.#
S. J. Pennycook, Y. Yan, A. Norman, Y. Zhang, M. Al-Jassim, A. Mascarenhas, S. P. Ahrenkiel, M. F. Chisholm, G. Duscher, and S. T. Pantelides, “Atomic-resolution z-contrast imaging and its application to compositional ordering and segregation”, in: MRS Proceedings, 1999, p. 235.#
B. J. Stanbery, C.-H. Chang, S. Kim, S. Kincal, G. Lippold, S. P. Ahrenkiel, L. Li, T. J. Anderson, and M. M. Al-Jassim, “Epitaxial growth of CuAu–ordered CuInSe 2 structural polytypes by migration enhanced epitaxy”, in: MRS Proceedings, 1999, p. 195.#
A. G. Norman, S. P. Ahrenkiel, H. R. Moutinho, C. Ballif, M. M. Al-Jassim, A. Mascarenhas, D. M. Follstaedt, S. R. Lee, J. L. Reno, E. D. Jones, J. Mirecki-Millunchick, and R. D. Twesten, “The nature and origin of lateral composition modulations in short-period strained-layer superlattices”, in: MRS Proceedings, 1999, p. 297.#
S. P. Ahrenkiel, “Diffraction contrast in TEM images of modulated semiconductor alloys”, in: Electron Crystallography, Springer Netherlands, 1997, pp. 363–366.#
R. K. Ahrenkiel, S. P. Ahrenkiel, D. J. Arent, J. M. Olson, and M. Wanlass, “Carrier transport in ordered and disordered in 0.53 ga 0.47 as”, in: MRS Proceedings, 1996, p. 181.#
R. D. Twesten, J. Mirecki Millunchick, S. P. Ahrenkielt, Yong Zhangt, S. R. Lee, D. M. Follstaedt, A. Mascarenhast, and E. D. Jones, “Microstructure of compositionally modulated InAlAs”, MRS Proceedings 441 (1996) 187.#
S. P. Ahrenkiel, M. H. Bode, M. M. Al-Jassim, H. Luo, S. H. Xin, and J. K. Furdyna, “Structural characterization of composition-modulated ZnSe l-x te x epitaxial films”, MRS Proceedings 417 (1995) 295.#
Michael H. Bode, S. P. Ahrenkiel, S. R. Kurtz, K. A. Bertness, D. J. Arent, and J. Olson, “Determination of the order parameter by quantitative tem techniques”, in: E.D. Jones, A. Mascarenhas, and P. Petroff (Eds.), MRS Proceedings, 1995, p. 55.#
M. M. Al-Jassim, K. M. Jones, S. P. Ahrenkiel, B. M. Keyes, S. M. Vernon, N. H. Karam, and J. Furdyna, “TEM and PL characterization of GaAs and ZnSe/ZnCdSe grown on si”, in: Extended Abstracts of the 1992 International Conference on Solid State Devices and Materials, The Japan Society of Applied Physics, 1992.#