Article
Materials Science, Multidisciplinary
Hiromi Nakano, Shota Ando
Summary: New phosphors Li-M-Ti-O:Mn4+ were synthesized using solid state reaction. A unique superstructure was formed by the periodic insertion of an intergrowth layer into a trigonal structure matrix. The relationship between PL intensity, Mn ion oxidation, and crystal structure was clarified through X-ray diffraction, transmission electron microscopy, and X-ray absorption spectroscopy.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Inorganic & Nuclear
Nicolas Zapp, Denis Sheptyakov, Alexandra Franz, Holger Kohlmann
Summary: Substituting hydrogen for oxygen atoms in metal oxides influences the solid-state properties, and holmium hydride oxide exhibits high thermal stability and inertness towards air, with an ordered fluorite superstructure.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
P. Armand, C. Reibel, D. Granier, M. Tillard
Summary: Crystals of the rare earth double molybdate KYb(MoO4)(2) were grown by spontaneous nucleation from a K2Mo4O13 flux. The material has been characterized using various analytical methods, revealing its crystal structure and magnetic properties. The temperature-dependent magnetic susceptibility of KYb(MoO4)(2) follows a Curie-Weiss law with a Weiss constant of -52 K.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Crystallography
Shaoliang Zhang, Ruili Du, Xiufang Fan, Xinhua Zhao, Yanlan Wang, Shanshan Li
Summary: Using N2O4 donor symmetric ligand H2L and dca co-ligand, two isostructural dinuclear Cu-II-Ln(III) complexes [Cu(Cl)(L)Ln(NO3)(CH3OH)(H2O)(dca)] [Ln=Ho (1(CuHo)), Gd (2(CuGd))] were designed, synthesized and studied. The geometric environment around the nine-coordinated Ln(III) ions is muffin, while the geometry of the penta-coordinated Cu(II) ions is square pyramid in these two compounds. The magnetic properties of both complexes were also investigated, showing ferromagnetic interactions between Cu(II) and Gd(III) in complex 2(CuGd) and slow magnetic relaxation behavior in complex 1(CuHo).
Article
Chemistry, Physical
Areli A. Molina-Paredes, Jesus A. Lara-Ceron, Marisol Ibarra-Rodriguez, Casiano del Angel-Mosqueda, H. Rasika Dias, Victor M. Jimenez-Perez, Blanca M. Munoz-Flores
Summary: Nowadays, designing eco-friendly synthesis with high atom economy and low E-factor is one of the biggest challenges for chemists worldwide. Solvent-free reactions are considered one of the best approaches to avoid waste. In this study, a series of solvent-free synthesis of five oxalamides was reported, yielding high purity products. NMR and X-ray diffraction results revealed the characteristic interactions of N,N'-oxalamides.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Yin L. Xu, Yang M. Chen, Xiao Z. Yan, Yi B. Huang, Xing Z. Zhou, Quan X. Wu, Xiao W. Sheng, Fang G. Kuang
Summary: In this study, the crystal structures and physical properties of an H-S-La system were systematically investigated using first-principles calculations combined with the CALYPSO structure exploration technique. Four stable stoichiometries were predicted, and the superconducting transition temperatures of these compounds were calculated.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Bryce G. Mullens, Matilde Saura-Muzquiz, Frederick P. Marlton, Maxim Avdeev, Helen E. A. Brand, S. Mondal, G. Vaitheeswaran, Brendan J. Kennedy
Summary: Synchrotron X-ray powder diffraction methods were used to study the structures and doping effects of lanthanoid tantalates and orthoniobates, revealing different crystal structures and changes in atomic bond lengths. This provides important clues for understanding the properties and phase transitions of these compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Crystallography
Rafal Dolot, Anna Maciaszek, Barbara Mikolajczyk, Barbara Nawrot
Summary: The crystallization experiments of heteroduplexes composed of DNA and 2'-OMe RNA strands showed that overhangs at the ends of the duplex greatly influence the success of crystallization and the crystal packing. The structures of these heteroduplexes, which adopted a conformation close to the A-RNA double helix, provide insight into their properties and can be useful for future applications.
Article
Physics, Multidisciplinary
Jingui Xu, Dongzhou Zhang, Sergey N. Tkachev, Przemyslaw K. Dera
Summary: Single-crystal x-ray diffraction (SCXRD) is crucial for studying crystal structures and phase transitions under high pressure. The PX2 program at the GSECARS 13-BM-C beamline offers state-of-the-art experimental capabilities for determining crystal structures under extreme conditions using SCXRD.
MATTER AND RADIATION AT EXTREMES
(2022)
Article
Polymer Science
Hai Wang, Dongtao Liu, Dongmei Cui, Yongfeng Men, Kohji Tashiro
Summary: The crystal structures of novel syndiotactic polymethoxystyrenes with -OCH3 groups at different positions have been elucidated, showing that the positions of the OCH3 side groups play a crucial role in determining the chain conformation and packing mode. The crystal structure of ortho-OMe-SPS is monoclinic with TTGG helical chains, while meta-OMe-SPS and para-OMe-SPS exhibit disordered structures in chain packing and conformation.
Article
Polymer Science
Xiang Shi, Pierre-Antoine Albouy, Pascale Launois
Summary: This study presents a different view that the evolution of X-ray patterns reflects changes in crystalline texture rather than polymorphism. This enables a quantitative description of X-ray fiber patterns but also highlights some fundamental structural issues.
Article
Chemistry, Inorganic & Nuclear
Mohd Ishtiyak, Subhendu Jana, Gopabandhu Panigrahi, Ankit Kumar Srivastava, S. Narayanswamy, Pinaki P. Bhattacharjee, Manish K. Niranjan, Jai Prakash
Summary: Two new chalcogenides CsSc5Te8 and Cs0.6(1)Ti6Se8 were synthesized using the high-temperature solid-state sealed tube method, and their crystal structures were determined. CsSc5Te8 exhibited a monoclinic structure with Cs+ cations present in one-dimensional tunnels, while Cs0.6(1)Ti6Se8 showed a hexagonal structure with TiSe6 distorted octahedra forming three-dimensional anionic networks. Optical absorption measurements suggested CsSc5Te8 is a semiconductor with a direct bandgap of 1.2(1) eV at room temperature.
SOLID STATE SCIENCES
(2021)
Article
Chemistry, Inorganic & Nuclear
Reona Iimura, Takuya Hasegawa, Shu Yin
Summary: Simple oxide materials, such as WO3, have high coloration efficiency but are limited in their ability to achieve multiple colors due to single ion redox reactions. Multiple oxide materials offer potential for various colors, but further research is needed. Tungsten-containing layered perovskites have been synthesized and evaluated for electrochromic applications, showing promising optical properties. Redox peaks and coloration efficiency can be controlled by the chemical formula of the perovskite unit.
INORGANIC CHEMISTRY
(2022)
Article
Crystallography
Ying Yang, Peng Zhu, Liu Yang, Jinjin Liu, Yongkai Li, Zhiwei Wang
Summary: In this study, the crystal growth, characterization, and electronic properties of HfSiS, ZrGeS, and ZrGeSe were investigated. All samples showed metallic behavior in temperature-dependent resistivity measurements, and HfSiS exhibited a large magnetoresistance and obvious SdH oscillation.
Article
Chemistry, Analytical
Baby Vasanthi, Narayana Panickar Gopakumar, Prabhakaran Sreekumari Anjana, Girija Nair
Summary: In this study, red-emitting Eu3+ activated SrGa2O4 phosphors were successfully synthesized and demonstrated good luminescence and mechanoluminescence properties. The synthesized phosphors showed potential applications in stress sensors, UV or near-UV light-emitting diodes, and phosphor-converted white light-emitting diodes.
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)