Article
Engineering, Electrical & Electronic
Martin Becker, Florian Kuhl, Jonas Hauptmann, Jill Kessler, Sebastian L. L. Benz, Sangam Chatterjee, Angelika Polity, Peter J. J. Klar
Summary: Vanadium dioxide (VO2) is the most promising material for thermochromic smart windows due to its insulator-to-metal transition causing an abrupt change of transmittance near ambient temperature. TiO2 buffer layers are beneficial for the growth and performance of VO2 thin film. The growth conditions of VO2||TiO2 interface are crucial, and only rutile buffer layers significantly relieve the growth conditions needed.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Analytical
Fei Yu, Yan Xue, Chaowei Zhong, Jiayi Song, Qiong Nie, Xin Hou, Baolei Wang
Summary: Ion beam-assisted deposition (IBAD) is a promising texturing technology for obtaining biaxial texture on a non-textured metal or compound substrate. In this study, the solution deposition planarization (SDP) method and electron-beam evaporation were used to deposit amorphous Y2O3 films and epitaxial MgO (epi-MgO) layer on the IBAD-MgO layer, respectively, to improve the texture. The results showed that the epi-MgO films had good texture quality.
Article
Nuclear Science & Technology
E. Pitthan, P. Petersson, T. T. Tran, D. Moldarev, R. Kaur, J. Shams-Latifi, P. Strom, M. Hans, M. Rubel, D. Primetzhofer
Summary: Sputter-deposited thin films (33-1160 nm) from EUROFER97 were obtained and analyzed on different substrates (C, Si, W, MgO) in argon and a mix of argon and deuterium atmosphere. The films exhibited lower density, higher hardness, and smaller crystallites compared to the bulk material, while their atomic composition was similar. Deposition in a deuterium-containing atmosphere resulted in low deuterium incorporation, suggesting low retention of hydrogen-isotopes.
NUCLEAR MATERIALS AND ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Martin Becker, Jill Kessler, Florian Kuhl, Sebastian L. Benz, Limei Chen, Angelika Polity, Peter J. Klar, Sangam Chatterjee
Summary: This study demonstrates the reliable fabrication of defined-phase, polycrystalline vanadium oxide films using ion-beam sputter-deposition (IBSD) and investigates the influence of growth parameters on different crystalline phases. It proves the potential of IBSD and its reliability in producing binary phases from the vanadium-oxygen phase space.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Avishek Banik, John Z. Tubbesing, Bin Luo, Xiaoting Zhang, Jay A. Switzer
Summary: The development of future optoelectronic materials relies on the high-performance p-type materials with optical transparency. Epitaxial growth of gamma-CuI on single crystalline Si(111) using a room-temperature electrochemical method demonstrates high in-plane and out-of-plane order. The deposition mechanism involves nucleating CuI seed crystals on n-Si(111) and simultaneous oxidation of Si to form SiOx, resulting in the lateral overgrowth of CuI seeds into a continuous film.
CHEMISTRY OF MATERIALS
(2021)
Review
Materials Science, Multidisciplinary
D. Depla
Summary: This paper discusses the impact of negative oxygen ions on film properties during reactive sputtering. Despite numerous studies on the subject, quantification is often lacking due to limited knowledge of negative ion yield for various oxides. The compilation of multiple literature sources provides a quantitative framework for the discussed trends.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2023)
Article
Materials Science, Ceramics
Li Zhao, Kaifeng Li, Kai Lv, Jinfeng Zhang, Zhongliang Liu, Haifeng Wang, Qinzhuang Liu
Summary: Epitaxial Cd2SnO4 films were successfully grown on MgO(00l) substrates under different conditions, showing low resistivity and high Hall mobility, with optical transmittance above 75% and an optical bandgap of around 3.09 eV. Metal-semiconductor transitions in the films were observed and explained by competitive effects, while the band structure and density of states were calculated using density functional theory.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Hanjun Tu, Shiwei Wang, Liangcheng Cui, Long Cheng, Guang-Hong Lu, D. J. O'Connor, Liqun Shi
Summary: The erosion behavior of tungsten exposed to low-energy, high flux deuterium plasma was investigated. It was found that eroded thicknesses increased with increasing irradiation fluence, while sputtering yields decreased gradually. Different sputtering threshold energies were observed for deuterium on pure tungsten and tungsten with carbon contamination, indicating that carbon impurities significantly enhanced the sputtering yield of tungsten.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
M. Kelemen, T. Schwarz-Selinger, A. Mutzke, M. Balden, E. Vassallo, M. Pedroni, D. Dellasega, M. Passoni, F. Romeo, A. Hakola, P. Pelicon, R. Zaplotnik, S. Markelj
Summary: The study found that the surface roughness has a significant influence on the sputter yield of Mo under keV D ion bombardment, with a strong angular dependence observed in the sputter yield. Smooth and moderately rough surfaces showed an increase in sputter yield at certain angles, while the highest roughness surfaces exhibited a decrease in sputter yield with increasing angle. The combination of measured and simulated data provides important insights for predicting erosion rates on surfaces in thermonuclear fusion devices.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Mitisha Jain, Silvan Kretschmer, Katja Hoeflich, Joao Marcelo Jordao Lopes, Arkady Krasheninnikov
Summary: Using simulations, defects in epitaxial graphene on SiC upon ion irradiation are studied. The results show that the substrate has minimal effect for He-ion irradiation but has a significant effect for Ne-ion irradiation. These findings can guide experimental design for defect-mediated engineering.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Instruments & Instrumentation
J. McLain, M. Gott, J. Greene, R. Scott, R. Vondrasek
Summary: In this experiment, a radium-223 ion beam was generated using the electron cyclotron resonance ion source (ECR2) at the Argonne Tandem Linac Accelerator System (ATLAS). The radium-223 material was prepared as a sputter sample by dissolving radium nitrate into a solution and depositing it onto aluminum powder. The ion beam intensity and energy requirements were 1 x 10(6) particles/s and 1.07 GeV, respectively.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Chemistry, Physical
Yixing Yang, Zeyu Xue, Jiajun Shao, Hao Yang, Jianbang Zheng, Jianlin Zhao
Summary: In this study, an ion beam co-growth preparation method was proposed to continuously adjust the optical band gap and absorption of lead selenide, thereby tuning its optoelectronic properties for solar energy and infrared sensing applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Deying Xia, Ying-Bing Jiang, John Notte, Doug Runt
Summary: This study compares the usage of a neon focused ion beam with the traditional gallium focused ion beam for milling GaAs material, finding that neon FIB produces less undesired artifacts and subsurface damage at lower energies. Additionally, neon FIB can create trenches as small as 20 nm wide with high fidelity and minimal damage.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Jiang Luo, Guodong Ren, Brandon M. Campbell, Dongyan Zhang, Tengfei Cao, Rohan Mishra, Bryce Sadtler
Summary: The electrochemical growth of bismuth selenide microcrystals in the metastable orthorhombic phase at room temperature in aqueous solution is reported in this study. The spontaneous formation of a seed layer containing nanocrystals of cubic BiSe enforces the metastable phase, allowing for the growth on a variety of substrates. This method broadens the range of applications for this semiconductor in optoelectronic and electrochemical devices.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Physics, Applied
Norio Akiyama, Tsukasa Dohi
Summary: The current-voltage characteristics of trigonal selenium nanowire crystals made via immersion in ethanol were studied, revealing a steep increase in current at the trap-filled limit voltage. Analysis based on a three-dimensional model estimated trap concentration and trap energy, compared with trap levels obtained from a photocurrent spectrum analysis. Different trap levels were attributed to deformation, OH- stretching mode, and CH- stretching mode.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)