Article
Crystallography
Siddhartha Suman, Nagaraju Mukurala, Ajay K. Kushwaha
Summary: Gallium Oxide (Ga2O3) nanostructures were synthesized using a hydrothermal approach, and the impact of different gallium precursors on the morphology of gallium nanostructures was studied. Different shapes of nanostructures were obtained depending on the precursor used, and post-synthesis thermal annealing at high temperatures led to significant alterations in the properties of the nanostructures.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Crystallography
Tatyana Zima, Nikolai Uvarov
Summary: Fluorine-doped tin oxide (FTO) crystal structures with different morphologies and phase compositions were synthesized using the hydrothermal method. The addition of NH4F to the initial solution controlled the pH of the reaction mixture, resulting in changes in crystal shape and structure. The flower-like FTO structures obtained at a mass ratio of F/SnO2 = 0.05 showed the highest conductivity due to the misoriented primary nanocrystals and their local interaction, which are formed during the spontaneous growth under hydrothermal conditions.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Materials Science, Multidisciplinary
Marija Suljagic, Predrag Vulic, Dejan Jeremic, Vladimir Pavlovic, Suzana Filipovic, Lukasz Kilanski, Sabina Lewinska, Anna Slawska-Waniewska, Milica R. Milenkovic, Aleksandar S. Nikolic, Ljubica Andjelkovic
Summary: Starch-coated cobalt ferrites were synthesized using various methods, resulting in materials with pure single-phase spinel structures. The morphology of the samples was found to be non-uniform, with particle aggregation being a dominant process. Starch was confirmed to be present in all coated samples, with particularly high saturation magnetization observed in samples obtained through ultrasonically assisted coprecipitation and microwave-assisted hydrothermal methods.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Materials Science, Multidisciplinary
J. Blasco, J. A. Rodriguez-Velamazan, G. Subias, M. C. Sanchez, J. L. Garcia-Munoz
Summary: The magnetism of SmBaMn2O5 was studied using magnetic and neutron diffraction measurements on a single crystal. The compound has an oxygen deficient perovskite structure with a layered ordering of Sm and Ba cations. The Mn atoms are arranged in a checkerboard pattern in the ab-plane, forming expanded-compressed pyramids. Below 134 K, the Mn moments exhibit ferrimagnetic ordering, while the Sm moments begin to polarize around 10 K in the ab-plane.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Physical
Karin Rettenmaier, Gregor A. Zickler, Guenther J. Redhammer, Thomas Berger
Summary: Mixed transition metal oxides are promising electrode materials for electrochemical energy storage and conversion. The synthesis of these materials with tailored composition, crystal structure, and morphology is crucial for optimizing their properties. This study reports on the room-temperature electrodeposition of a ternary oxide, ZnMnO3, using earth-abundant metals. The epitaxial growth of ZnMnO3 on ZnO nanowires results in a 2-dimensional morphology and shows promise for the direct growth of other mixed transition metal oxides on conductive substrates.
Article
Chemistry, Inorganic & Nuclear
George Agbeworvi, Wasif Zaheer, John D. D. Ponis, Joseph V. V. Handy, Jaime R. R. Ayala, Justin L. L. Andrews, Parker Schofield, Cherno Jaye, Conan Weiland, Daniel A. A. Fischer, Sarbajit Banerjee
Summary: This study compares s- and p-block monovalent trivanadates and demonstrates that lone-pair repulsions and lattice anharmonicity drive anisotropic structural distortions, which in turn modulate magnetic ordering of electrons on the trivanadate host framework. The stereoactive electron lone pairs derived from filled 5/6s(2) states of p-block cations have diverse applications and play a crucial role in modifying electronic structure and mediating superexchange interactions.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
E. Dvoretskaya, A. Palii, O. Koplak, R. Morgunov
Summary: By mixing powder samples of hexacoordinated Co(II) complex with ferromagnetic microparticles, a composite material is proposed to observe slow magnetic relaxation in cobalt complex even without external magnetic field, utilizing the controllable residual magnetic field of microparticles to suppress quantum tunneling of magnetization.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Adam Kubiak, Zuzanna Bielan, Aleksandra Bartkowiak, Elzbieta Gabala, Marcin Frankowski, Maciej Zalas, Katarzyna Siwinska-Ciesielczyk, Marcin Janczarek, Teofil Jesionowski
Summary: The multifunctional TiO2-ZnO heterostructures were prepared using a two-stage microwave method and exhibited high photocatalytic activity in phenol degradation and significantly improved photovoltaic parameters in DSSC cells.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Physical
Yishun Xie, Qingchuang Mu, Feiyan Lai, Guangchang Yang, Huijun Zhang, Shaorong Lu, Zheng Chen, Xiaohui Zhang, Qingyu Li
Summary: Morphology design is an effective strategy for improving the performance of Fe2O3 anode material for lithium-ion batteries. A dendritic Fe2O3 architecture was prepared using a hydrothermal route, with glycine guiding crystal growth and becoming carbon in the final composite. The coralloid Fe2O3/NC composite integrates the advantages of porous and low-dimensional electrode materials, providing more space for ion exchange, better mechanical stability, and improved electron conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Bing Yu, Kui Xu, Yang Shen, Yurui Zhang, Lin Sun, Weibin Lei, Shuai Yang, Fangyu Yue, Zaiyong Zhang, Chungang Duan, Qiuxiang Zhu, Qingbiao Zhao
Summary: Two novel compounds, Bi2Ni(SeO3)(4) and Bi2Ni(SeO3)(4).2H(2)O, were synthesized by hydrothermal method and their crystal structures were determined. Magnetic measurements showed that Bi2Ni(SeO3)(4) exhibits magnetic frustration with a Weiss temperature of -21 K, but does not exhibit any magnetic ordering.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Vasundhara Madaan, Krishan Kumar
Summary: The degradation of rose bengal dye was studied under UV irradiation using CeO2 doped with oxygen-deficient Gd3+ ions prepared via the sol-gel technique. XRD analysis confirmed a single-phase crystalline structure with crystallite size ranging from 7.38 nm to 9.48 nm and lattice parameters ranging from 5.407 angstrom - 5.420 angstrom. HR-TEM analysis revealed spherical particles with sizes in the range of 7.6 nm-9.8 nm. Raman analysis confirmed the presence of oxygen vacancies. The synthesized photocatalysts exhibited excellent degradation performance for rose bengal dye under UV irradiation, with degradation rates increasing from 73.06% to 92.32% upon doping, and thus have potential applications in environmental remediation.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Crystallography
Jiaxin Chen, Munetoshi Seki, Md Shamim Sarker, Hiroyasu Yamahara, Hitoshi Tabata
Summary: The study demonstrates the formation of self-organized nanostructures in CoGa0.8Mn1.2O4 thin films through thermal annealing. Post-annealing in air promotes crystalline phase separation into tetragonal and cubic phases, resulting in the formation of a nano-zigzag pattern. The structural and magnetic properties of the nanostructured films strongly depend on the annealing time due to the inter-diffusion of Ga and Mn ions.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Crystallography
Daniel A. Wilson, Kshitij Gurung, Marjorie A. Langell
Summary: ZnxCu1_xO nanoparticles were synthesized by microwave heating, leading to the formation of single-phase tenorite crystallites with various zinc concentrations. The increase in zinc concentration also resulted in a morphological change in the nanoparticles.
JOURNAL OF CRYSTAL GROWTH
(2021)
Article
Chemistry, Multidisciplinary
Yan-Min Zou, Xiao-Yun Lan, Wen Ma, Jian-Ce Jin, Hai-Yan Sun, Ji-Long Li, Mei-Ling Feng, Xiao-Ying Huang
Summary: Two new cesium-containing manganese vanadates, featuring 3D microporous frameworks, were synthesized using a facile method. The compounds, 2 and 3, are the first examples of Cs-Mn-V-O compounds with such structures, providing a new synthetic pathway for alkali-metal containing heterometallic vanadates.
Article
Materials Science, Multidisciplinary
Saifei Dai, Mingya Li, Xiaoqiang Wang, Haiyang Zhu, Yihan Zhao, Zhisheng Wu
Summary: A new high-entropy spinel oxide, (Co,Zn,Fe,Mn,Ni)3O4, was prepared by solution combustion synthesis method, and its structure and magnetic properties were compared with other similar oxides. It was found that the magnetic properties can be tailored by controlling the components of high-entropy oxides.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Review
Chemistry, Physical
Lu Zheng, Xuewen Wang, Hanjun Jiang, Manzhang Xu, Wei Huang, Zheng Liu
Summary: Flexible electronics is an interdisciplinary research field that offers novel device configurations, low-cost, and low-power consumption. 2D materials, especially transition metal dichalcogenides, show great potential in flexible electronic devices and optoelectronic devices due to their excellent electrical, optical, and mechanical properties. The review discusses the recent progress and applications of 2D TMDs in flexible electronics, covering fundamental electrical and mechanical properties, flexible device configurations, and performance in transistors, sensors, and photodetectors, as well as future challenges and prospects for these devices.
Article
Chemistry, Multidisciplinary
Manzhang Xu, Bijun Tang, Yuhao Lu, Chao Zhu, Qianbo Lu, Lu Zheng, Jingyu Zhang, Nannan Han, Weidong Fang, Yuxi Guo, Jun Di, Pin Song, Yongmin He, Lixing Kang, Zhiyong Zhang, Wu Zhao, Cuntai Guan, Xuewen Wang, Zheng Liu
Summary: The study demonstrates the application of supervised machine learning in guiding the synthesis of high-quality quasi-1D WTe2 nanoribbons through chemical vapor deposition, uncovering the profound influence of H2 gas flow rate and source ratio on the formation and morphology of WTe2. The proposed growth mechanism of 1T' few-layered WTe2 nanoribbons offers new insights for the growth of intriguing 2D and 1D tellurides, showcasing the potential of machine learning in guiding the synthesis of 1D nanostructures and opening up new opportunities for intelligent materials development.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Juncai Song, Yuan Wei, Manzhang Xu, Jiuwei Gao, Lei Luo, Hao Wu, Xingji Li, Yue Li, Xuewen Wang
Summary: This work proposes a method for the design, fabrication, and characterization of flexible temperature sensors using temperature-sensitive materials. The sensors show excellent performance with features such as low cost, simple preparation process, fast response time, and the potential to be used in medical rehabilitation and early disease prevention.
ACS APPLIED POLYMER MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Weiwei Li, Manzhang Xu, He-Xiu Xu, Xuewen Wang, Wei Huang
Summary: Since the first demonstration, remarkable progress has been made in the theoretical analysis, structural design, numerical simulation, and potential applications of metamaterial absorbers (MAs). With the continuous advancement of novel materials and creative designs, the absorption of MAs is significantly improved over a wide frequency spectrum from microwaves to the optical regime. Further, the integration of active elements into the MA design allows the dynamical manipulation of electromagnetic waves, opening a new platform to push breakthroughs in metadevices.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jiuwei Gao, Yubo Fan, Qingtian Zhang, Lei Luo, Xiaoqi Hu, Yue Li, Juncai Song, Hanjun Jiang, Xiaoyu Gao, Lu Zheng, Wu Zhao, Zhenhua Wang, Wei Ai, Yuan Wei, Qianbo Lu, Manzhang Xu, Yongtian Wang, Weitao Song, Xuewen Wang, Wei Huang
Summary: This study develops robust and stretchable conducting microfibers for fabricating mechanical sensors. The sensor shows high sensitivity in detecting strains and low frequency vibrations, making it suitable for a wide range of applications.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Xiaoyu Gao, Wenru Fan, Wei Zhu, Gao Jiuwei, Pengfang Zhang, Chen Wang, Xuewen Wang, Hesheng Xia, Zhenhua Wang, Wei Huang
Summary: A new strategy of dynamic integrated moiety is developed to construct covalent and noncovalent cross-linked polyurethane elastomers, achieving excellent overall mechanical properties of strength, toughness, stretchability, and healing efficiency.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Yongmin He, Liren Liu, Chao Zhu, Shasha Guo, Prafful Golani, Bonhyeong Koo, Pengyi Tang, Zhiqiang Zhao, Manzhang Xu, Peng Yu, Xin Zhou, Caitian Gao, Xuewen Wang, Zude Shi, Lu Zheng, Jiefu Yang, Byungha Shin, Jordi Arbiol, Huigao Duan, Yonghua Du, Marc Heggen, Rafal E. Dunin-Borkowski, Wanlin Guo, Qi Jie Wang, Zhuhua Zhang, Zheng Liu
Summary: A wafer-size amorphous PtSex film with high atom-utilization efficiency has been fabricated through a low-temperature amorphization strategy. This film acts as a single-atom-layer catalyst for high-flux hydrogen production and can potentially be extended to other noble metals.
Article
Materials Science, Composites
Xiaoqing Yue, Jianqun Yang, Jiuwei Gao, Xiaodong Xu, Yuhang Jing, Xuewen Wang, Weiqi Li, Xingji Li
Summary: In this study, electron irradiation was used as a novel and simple method to fabricate wearable strain sensors with high comprehensive performance. The sensors, made by uniformly adsorbing hydroxylated multi-walled carbon nanotubes on etched ecoflex and then irradiating them, exhibited ultra-low detection limit, fast response, and wide sensing range. The irradiated sensors showed significantly improved performance compared to the unirradiated sensors.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Weiwei Li, Manzhang Xu, Jiuwei Gao, Xiaoshan Zhang, He Huang, Ruoqing Zhao, Xigang Zhu, Yabao Yang, Lei Luo, Mengdi Chen, Hongjia Ji, Lu Zheng, Xuewen Wang, Wei Huang
Summary: A method combining inkjet printing and thermal annealing is reported to directly synthesize large-scale MoS2 patterns. The patterned MoS2 is obtained directly on a polymer substrate through thermal treatment in an atmosphere of argon/hydrogen. This approach is used to manufacture various flexible sensing devices that are insensitive to body motions and moisture.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Qi Wang, Keer Huang, Wu Zhao, Lei Li, Xuewen Wang
Summary: Based on first-principles calculations, we predict FM MnHg2Te3 to be a candidate for Weyl semimetal. The topological properties of this system remain unchanged when the spin direction is adjusted, while the bandgap can be modified. Furthermore, we obtain surface states consistent with the properties of an antiferromagnetic topological insulator.
APPLIED PHYSICS LETTERS
(2022)
Article
Polymer Science
Ruoqing Zhao, Hao Wu, Xuan Dong, Manzhang Xu, Zhenhua Wang, Xuewen Wang
Summary: In this study, we successfully prepared a high-toughness free-standing polyimide (PI) film for highly precise flexible and chip-integrated sensors. The prepared PI films exhibited significantly superior mechanical properties compared to PI films of the same molecular structure, which can be attributed to the systematic exploration of the film-forming process. The thickness uniformity and surface homogeneity of free-standing films, as well as the elimination of residual stress, were crucial factors for achieving excellent mechanical properties.
Article
Chemistry, Multidisciplinary
Li Ma, Liu Yang, Yuqiang Fang, Manzhang Xu, Ruihuan Duan, Vanessa Li Zhang, Xuewen Wang, Fuqiang Huang, Menghao Wu, Zheng Liu, Ting Yu
Summary: This study reports the observation of room-temperature out-of-plane switchable electric polarization in MoS2 monolayers. Trapped water/ice molecules are found to be responsible for this phenomenon. These findings suggest that monolayers with trapped single layer of polar molecules could be emerging alternatives to 2D ferroelectrics.
Article
Multidisciplinary Sciences
Yue Li, Yuan Wei, Yabao Yang, Lu Zheng, Lei Luo, Jiuwei Gao, Hanjun Jiang, Juncai Song, Manzhang Xu, Xuewen Wang, Wei Huang
Summary: Flexible and wearable pressure sensors are crucial for accurate and real-time tracking of physiological signals. This study presents a novel type of sensor that overcomes the saturation and achieves ultra-high sensitivity and wide detection range through the soft-strain effect. The sensor demonstrates excellent stability and capability for monitoring arterial pulse waves.
Article
Engineering, Mechanical
Yuan Wei, Shuang Li, He Huang, Chongliang Ding, Xuewen Wang
Summary: This study investigates the synergistic effects of micro groove texture and WSe2 flakes as solid lubricants on reducing friction in dry sliding contact. The experiments show that the combination of micro grooves and WSe2 flakes can reduce the coefficient of friction by 80% compared to non-textured cases. The optimal groove width and WSe2 flake size were determined, and the influence of WSe2 granularity on friction reduction was discussed based on SEM observations.
Article
Materials Science, Multidisciplinary
Xiaoqing Yue, Jiuwei Gao, Jianqun Yang, Zhongli Liu, Xuewen Wang, Lei Dong, Enhao Guan, Shuhao Hou, Fengkai Liu, Xingji Li
Summary: With the continuous development of science and technology, the demand for wearable flexible sensors has become urgent. This study proposes a method for surface modification of sensors based on electron irradiation to obtain high-performance wearable sensors at low cost. The results show that under the synergistic effect of low temperature and electron irradiation, the sensitivity of the irradiated sensor is higher due to the introduction of more defects and active functional groups. The synergistic modification method provides a new idea for obtaining wearable sensors with high performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
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)
