Article
Materials Science, Multidisciplinary
T. M. Aper, F. K. Yam, K. G. Saw, Khi Poay Beh, Khaled M. Chahrour
Summary: In this study, indium oxide nanostructured films were synthesized using hydrogen assisted atmospheric pressure chemical vapor deposition technique at different deposition temperatures. The films' surface morphology, crystallinity, and optical properties were characterized, and their photoelectrochemical (PEC) activity was investigated. The sample grown at 950 degrees C exhibited optimal PEC performance, with high photocurrent density, incident photon to current conversion efficiency, and applied bias to photon conversion efficiency. The superior PEC performance of the sample was attributed to the film composition, crystallinity, bandgap reduction, flat band potential, and charge carrier density.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Physical
Xiucai Sun, Xiaoting Liu, Zhongti Sun, Xintong Zhang, Yuzhu Wu, Yeshu Zhu, Yuqing Song, Kaicheng Jia, Jincan Zhang, Luzhao Sun, Wan-Jian Yin, Zhongfan Liu
Summary: This study reveals the importance of vapor catalysis in superclean graphene growth through density functional theory calculations, an ideal gas model, and a designed experiment. The study finds that the vapor mainly consists of Cui clusters, which have a significant impact on graphene growth. DFT calculations show that Cu clusters exhibit strong capabilities for adsorption, dehydrogenation, and decomposition, providing a sufficient supply of active carbon atoms for rapid graphene growth. Experimental validation confirms that increasing the amount of Cu vapor improves the growth rate and surface cleanliness of graphene.
Article
Chemistry, Physical
Ben McLean, Izaac Mitchell, Feng Ding
Summary: This study reveals the mechanism of single-walled carbon nanotube (SWCNT) growth in alcohol chemical vapor deposition (ACVD) through density functional tight binding molecular dynamics simulations. The results demonstrate that the catalyst composition can be controlled by reaction pathways mediated by hydroxyl OH radicals, leading to promotion of SWCNT growth.
Article
Physics, Applied
Daisuke Kan, Hiroshi Shiraki, Shinji Horai, Yuichi Shimakawa
Summary: Crystal growth techniques using mist precursors have been investigated for epitaxial thin films growth of functional oxides. In this study, the epitaxial growth mechanism of magnetite Fe3O4 using alcoholic mists of iron acetylacetonate precursors was investigated. The results show that the properties of the grown epitaxial films depend on mist flow rates and can be modified by changing water additive concentrations or the distance between the mist bottle and the reaction chamber.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Guanmeng Li, Weifeng Zhang, Yan Zhang, Yangjin Lee, Zihan Zhao, Xue-zhi Song, Zhenquan Tan, Kwanpyo Kim, Nan Liu
Summary: Synergistic additives, ammonium salts, have been used in the chemical vapor deposition (CVD) growth of MoS2 to achieve controlled domain layering and shape, as well as centimeter-scale films. This method enables direct fabrication of MoS2 electronic devices on clean substrates without the need for transfer steps, and it also promotes improved hydrogen evolution reaction (HER) performance. The use of ammonium salts in CVD paves the way for practical applications of MoS2 in modern electronics and catalysis.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Physics, Multidisciplinary
Nikolaos Cheimarios, Deifilia To, George Kokkoris, George Memos, Andreas G. Boudouvis
Summary: Monte Carlo and kinetic Monte Carlo models are widely used for studying physicochemical surface phenomena in deposition processes, offering a more detailed approach than popular molecular methods and addressing larger time and spatial scales. This review explores the modern applications of MC/kMC models in deposition processes.
FRONTIERS IN PHYSICS
(2021)
Article
Chemistry, Physical
Quang Chieu Bui, Bassem Salem, Herve Roussel, Xavier Mescot, Youssouf Guerfi, Carmen Jimenez, Vincent Consonni, Gustavo Ardila
Summary: High temperature annealing under oxygen atmosphere has significant effects on the structure and properties of ZnO thin films, leading to improvements in grain boundary velocity and piezoelectric amplitude, ultimately enhancing the piezoelectric performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Kemeng Yang, Jiapeng Wang, Lin Wu, Yafei Yan, Xi Tang, Wei Gan, Liang Li, Yang Li, Hui Han, Hui Li
Summary: The controllable growth of α-In2Se3 flakes using confined-space modulated chemical vapor deposition (CVD) method was successfully achieved. The α-In2Se3 flakes preferentially deposited on the inner surfaces of the confined space, while the β-In2Se3 flakes were mainly grown on the outer surfaces. The grown α-In2Se3 flakes exhibited a large size of approximately 60 μm, uniform thickness of approximately 2.8 nm, and distinct ferroelectric properties. This research provides an effective and easily accessible method for controllable growth of two-dimensional layered materials and holds promise for further exploration of the physical properties and potential practical applications of van der Waal crystals.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Pamela Machado, Roger Guzman, Ramon J. . Morera, Jordi Alcala, Anna Palau, Wu Zhou, Mariona Coll
Summary: The need for highly performant and stable p-type transparent electrodes based on abundant metals is driving research on perovskite oxide thin films. Cost-efficient and scalable solution-based techniques are being explored to prepare these materials and extract their full potential.
CHEMISTRY OF MATERIALS
(2023)
Review
Computer Science, Interdisciplinary Applications
N. Cheimarios, G. Kokkoris, A. G. Boudouvis
Summary: Chemical vapor deposition (CVD) is a well-established process for producing thin solid films for industrial and scientific applications for over 30 years. It is a multiscale process involving both cm to m scale reactors and micro-/nano- to atomic-scale deposited films. Various multiscale models and methodologies have been proposed over the years for the design, analysis, and optimization of the CVD process.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Asha Yadav, Bo Fu, Stephanie Nicole Bonvicini, Linh Quy Ly, Zhitai Jia, Yujun Shi
Summary: beta-Ga2O3 nanostructures with different morphologies, including nanowires, nanosheets, and nanorods, were successfully synthesized using thermally dewetted Au nanoparticles as catalysts. The growth of the nanostructures was found to be governed by different mechanisms, with the vapor-liquid-solid mechanism governing nanowire growth and the vapor-solid mechanism occurring in the growth of nanosheets and nanorods. The as-grown beta-Ga2O3 nanostructures exhibited high purity, wide bandgap, and strong photoluminescence emission, making them promising for applications in optoelectronic devices such as tunable UV-Vis photodetectors.
Article
Chemistry, Multidisciplinary
Zixuan Wang, Wenshuo Xu, Benxuan Li, Qiaoyan Hao, Di Wu, Dianyu Qi, Haibo Gan, Junpeng Xie, Guo Hong, Wenjing Zhang
Summary: This study reports a facile and controllable method for the selective growth of WS2/MoS2 vertical or lateral heterojunctions on metal substrates. By tuning the hydrogen flow rate, the growth mode can be switched, and the coverage of the heterostructures can be adjusted. The research paves the way for the development of two-dimensional heterostructures for applications in (opto)electronic devices.
Article
Chemistry, Physical
Pierre Tomasini
Summary: The silicon chemical vapor deposition process via silane is determined using classical thermodynamics, showing that a linear function of temperature controls silicon growth rates and neatly maps the response of growth rate activation energy, providing clarity to the parameter space. The study demonstrates the portability of the linear function of temperature across reactors and extracts reactor scaling factors, reducing the complex silicon deposition process to its essentials through thermodynamics.
CHEMISTRY OF MATERIALS
(2021)
Article
Crystallography
Tomoaki Oga, Ryoya Kai, Naho Kaneko, Hisashi Miyazaki, Satoru Kaneko, Akifumi Matsuda, Mamoru Yoshimoto
Summary: The effect of VUV light irradiation on the COP substrates enhanced the crystal growth and improved the optical properties of ZnO thin films used in flexible optical devices. The pretreatment made the COP surface hydrophilic and smooth, resulting in increased orientation growth and crystallinity of the ZnO thin films. The resistivity of the ZnO thin film on the pretreated COP substrate was lower than that on the untreated substrate.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Chemistry, Multidisciplinary
Seong Ho Han, Raphael Edem Agbenyeke, Ga Yeon Lee, Bo Keun Park, Chang Gyoun Kim, Taeyong Eom, Seung Uk Son, Jeong Hwan Han, Ji Yeon Ryu, Taek-Mo Chung
Summary: The text discusses the synthesis of a new series of heteroleptic tin complexes and their application in the deposition of SnOx films. The complexes exhibit dimeric molecular structures with specific crystal structures, resulting in SnO and SnO2 films with differences in transparency and optical band gap.
Article
Crystallography
Jianzheng Hu, Long Yan, Ning Zhou, Yao Chen, Xiaoni Yang, Lianqiao Yang, Shiping Guo
Summary: The effect and mechanism of carrier gas velocity, V/III ratio, and carrier gas velocity match on the growth rate of AlN were investigated in this study. The results showed that the growth rate of AlN initially increased with hydrogen flow rate, reached saturation, and then decreased monotonically. The turning point value depended on the equipment and process. By increasing the MO VM, the growth rate of AlN could be improved, but the uniformity deteriorated due to turbulence and loss of uniform boundary layer. High quality AlN films were successfully grown on nano-patterned sapphire substrates with improved crystalline quality and atomic smooth surfaces.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Tingting Ma, Yang Li, Kangning Sun, Qinglin Cheng, Sen Li
Summary: This study investigates the melting process and nucleation behavior of sodium crystals using molecular dynamics simulation. The results show good agreement between simulated and experimental values for the melting temperature, density, and radial distribution function of sodium. The diffusion coefficient of liquid sodium increases linearly with temperature, and the homogeneous nucleation rate of melting in superheated sodium crystal exponentially increases with temperature. The findings provide theoretical support for applications involving heat and mass transfer in sodium-related systems.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Hisato Nishii, Shintarou Iida, Akira Yamasaki, Takumi Ikenoue, Masao Miyake, Toshiya Doi, Tetsuji Hirato
Summary: Epitaxial V2O3 films were fabricated on sapphire substrates using mist chemical vapor deposition (mist CVD) method, eliminating the need for high vacuum conditions. The films can be grown on sapphire substrates even under atmospheric pressure, with the optimal growth temperature at 823 K. The films grown at 823 K exhibit a metal-insulator transition at approximately 155 K. The film on C-plane sapphire exhibits a lower transition temperature compared to those on R- and A-plane sapphire substrates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Jani Jesenovec, Kevin Zawilski, Peter Alison, Stephan J. Meschter, Sambit K. Saha, Andrew J. Sepelak, Peter G. Schunemann
Summary: In this study, NiSb needles were successfully formed in InSb by manipulating the growth rate and adding NiSb. These needle structures in InSb can be used to tune the magnetoresistance of devices. Additionally, undoped InSb crystals demonstrated good infrared transmission at low growth rates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
D. Joseph Daniel, P. Karuppasamy, H. J. Kim
Summary: The 2-amino 4-methyl pyridinium oxalate (2A4MPO) compound was synthesized and its crystal structure, functional groups, thermal stability, electrical properties, and third-order nonlinear optical properties were studied. The results demonstrate that the synthesized crystal has good structural integrity, thermal stability, and potential for third-order nonlinear optical applications.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
C. W. Lan
Summary: The past two decades have witnessed a significant transformation in solar silicon crystal growth, especially in the competition between multi-crystalline silicon (Multi-Si) and mono-crystalline silicon (Mono-Si). The demand for this crucial material has exponentially surged, with silicon solar panels capturing over 95% of the global PV market share. The advancements in crystal growth technology during this period have set historical benchmarks, with the market share shifting from high-performance multi-crystalline silicon (HPM-Si) to CZ silicon.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peiyao Hao, Lili Zheng, Hui Zhang
Summary: A novel design of argon gas tube for removing impurities during silicon ingot growth was developed, and numerical simulations showed that it can effectively extract SiO.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Geetika Sahu, Chanchal Chakraborty, Subhadeep Roy, Souri Banerjee
Summary: This article discusses the novel fractal nature of hydrothermally synthesized MoS2 QDs. By adjusting the reaction time, the study found that the average size of QDs increases and then decreases with longer reaction times. STEM images indicate that shorter reaction times lead to sheet formation, while extended reaction times cause sheets to fragment into QDs.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Pengjian Lu, Wei Huang, Junjun Wang, Haitao Yang, Shiyue Guo, Bin Li, Ting Wang, Chitengfei Zhang, Rong Tu, Song Zhang
Summary: A systematic study on the tetramethylsilane-hydorgen (TMS-H-2) system for the deposition of pure single-crystal SiC by high-temperature chemical vapor deposition (HTCVD) method is conducted. The study investigates the effect of temperature, pressure, and H-2:TMS ratio on the deposition conditions and provides a theoretical basis and guidance for improving the quality and cost of industrial production of single-crystal SiC.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Xinyu Jiang, Liangliang Liu, Yanqing Liu, Yan Wang, Zhaoping Hou
Summary: Investigation on the preparation of anisometric templated textured high entropy or multi-element doped ferroelectric ceramics was conducted using A-site disordered niobate microcrystals. The effects of process parameters on the morphology and chemical composition were studied, and the photocatalytic properties of the microcrystals were evaluated.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Mobashsara Tabassum, Md. Ashraful Alam, Sabrina Mostofa, Raton Kumar Bishwas, Debasish Sarkar, Shirin Akter Jahan
Summary: In this study, high crystallinity copper nanoparticles were synthesized by altering the reaction medium at low temperatures. The results show that changing the reaction medium can reduce the surface energy of precursors and promote the formation of highly crystalline copper nanoparticles.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Ivan Bodnar, Vitaly V. Khoroshko, Veronika A. Yashchuk, Valery F. Gremenok, Mohsin Kazi, Mayeen U. Khandaker, Tatiana I. Zubar, Daria I. Tishkevich, Alex Trukhanov, Sergei Trukhanov
Summary: This work presents the production of single crystals of Cu2ZnGeSe4, a semiconducting quaternary compound, using a gas chemical method with iodine as a transporter. The phase state, crystal structure, and lattice constants of the synthesized samples were refined and determined. The band gap of Cu2ZnGeSe4 was calculated using transmission spectrum and it was found that the band gap increases by 12% with decreasing temperature in the range of 20-300 K.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Timur Malin, Igor Osinnykh, Vladimir Mansurov, Dmitriy Protasov, Sergey Ponomarev, Denis Milakhin, Konstantin Zhuravlev
Summary: The effect of growth temperature on the buffer leakage currents of GaN-on-Si layers was investigated. It was found that higher growth temperature results in lower leakage currents. The defects in GaN layers grown at different temperatures were studied using photoluminescence technique, and a correlation between leakage currents, structural perfection, and donor concentration in GaN-on-Si layers was established. It was also observed that reduced growth temperature leads to the formation of inversion domains.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Thi-Hoai-Thu Nguyen, Jyh-Chen Chen
Summary: The effect of heater power control on heat, flow, and oxygen transport for CCz crystal growth was studied. Shorter upper side heater design could improve crystal quality and growth, but with higher power consumption.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peter Rudolph
Summary: This article presents an overview of selected contributions to the development of crystal growth technology by the Laudise Prize awardee 2023. It discusses various aspects such as shaped crystal growth, the correlation between melt structure and crystal quality, control of intrinsic defects and inclusions, prevention of dislocation cell patterns, and melt growth experiments under a travelling magnetic field.
JOURNAL OF CRYSTAL GROWTH
(2024)