Article
Chemistry, Physical
Ioan Petrovai, Otto Todor-Boer, Leontin David, Ioan Botiz
Summary: In this study, the researchers found that the nucleation and growth of perovskite crystals can be controlled by manipulating the evaporation rate of solvents. Temperature control was used to regulate the rate of solvent evaporation, leading to variations in the growth rate and shape of perovskite crystals. Diluted perovskite solutions were utilized to control nucleation and promote the growth of a limited number of crystals, which exhibited sixfold symmetry. Crystals formed at lower temperatures (40-60 degrees C) displayed a more compact dendritic morphology, while those grown at higher temperatures (80-110 degrees C) exhibited a fractal dendritic shape.
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
Jesus Valdes, Daniel Resendiz, Angeles Cuan, Rufino Nava, Bertha Aguilar, Carlos M. Cortes-Romero, Oracio Navarro
Summary: The study compared the effects of hydrothermal synthesis with and without microwave radiation on double perovskite Sr2FeMoO6, finding that microwave radiation enhances synthesis efficiency, reduces particle size, and maintains good crystallinity.
Article
Materials Science, Ceramics
Z. Ghorbani, M. H. Ehsani
Summary: Double perovskite oxide compounds Ba2-xSmxFeMoO6 (0.0 <= x <= 0.1) were synthesized using the sol-gel method. The effect of heat treatment on the synthesis of single-phase double perovskite Ba2FeMoO6 (BFMO) was investigated. The crystal structure was analyzed using X-ray diffraction, and the valence states of Oxygen were determined using X-ray photoelectron spectroscopy. Fourier transform infrared spectra showed a shift in peak positions with Sm3+ doping, and FESEM images revealed changes in morphology.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Jinya Suzuki, Hiroyasu Okochi, Naoki Matsui, Teppei Nagase, Haruki Tochizawa, Hiroki Sahara, Takumi Nishikubo, Yuki Sakai, Takuya Ohmi, Zhao Pan, Takashi Saito, Hiroyuki Saitoh, Atsunori Ikezawa, Hajime Arai, Ryoji Kanno, Takafumi Yamamoto, Masaki Azuma
Summary: In this study, new perovskite oxyhydrides SrVO2.4H0.6 and Sr3V2O6.2H0.8 were successfully synthesized. The addition of SrCl2 flux was found to promote diffusion during high-pressure and high-temperature reactions, enabling the selective synthesis of oxyhydride phases. The role of this flux and reaction pathways were investigated using in-situ synchrotron X-ray diffraction measurements. The newly synthesized oxyhydrides exhibited excellent reversibility and high-rate characteristics as anode materials for Li-ion batteries, marking the first application of oxyhydrides in this context. This synthesis approach could also be applied to various types of multi-component systems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Inorganic & Nuclear
Yong -Bo Tan, Xue-Min Jing, Hui-Jie Lu, Yu-Xuan Ma, Xing-Yao Cui
Summary: A 3D supermolecular framework copper(II)-2-isobutyl-1H-imidazoledicarboxylate has been successfully synthesized under hydrothermal conditions with the assistance of ultrasonic stirring. The resulting compound exhibits good thermogravimetric stability and antiferromagnetic properties.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Crystallography
Megan M. Smart, Cheryl A. Moore, Colin D. Mcmillen, Joseph W. Kolis
Summary: New compositions of synthetic vesuvianite were obtained using hydrothermal synthesis, including Ca19Al13Si18O71(OH)(7) and Sr19Fe12Ge19O72(OH)(6) with vesuvianite-type structures. By using different starting materials and mineralizers, crystals with different compositions were successfully synthesized.
Article
Materials Science, Multidisciplinary
Masayuki Fukuda, Ikuya Yamada, Hajime Hojo, Chihiro Takahashi, Yuya Yoshida, Katsuhisa Tanaka, Masaki Azuma, Koji Fujita
Summary: A novel A-site deficient quadruple perovskite oxide, CuNb2O6, has been successfully synthesized using high-pressure techniques and topochemical structural transformation. The compound crystallizes into a non-centrosymmetric cubic structure with antiferromagnetic order below 12 K and exhibits a colossal dielectric constant. The results are expected to guide the development of new functional materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Inorganic & Nuclear
Jingwen Long, Xing Huang, Meiyan Cui, Zhiying Zhao, Zhangzhen He
Summary: A new fluorophosphate PbCuPO4F was synthesized via a hydrothermal method, displaying unique tunnel structure and magnetic behavior, as well as possessing a wide optical band gap.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yuanjun Zhang, Changke Lu, Meiyan Cui, Zhiying Zhao, Zhangzhen He
Summary: Two new iron-based selenites AFe2(SeO3)4 (A = Sr and Hg) were synthesized by a hydrothermal reaction. Both compounds exhibit classic channel structures, with SrFe2(SeO3)4 and HgFe2(SeO3)4 crystallizing in different space groups. Magnetic measurements reveal antiferromagnetic ordering below TN = 23.5 K for SrFe2(SeO3)4 and below TN = 34 K for HgFe2(SeO3)4. Optical band-gaps estimated from UV-vis diffuse reflectance spectra suggest that both compounds may be semiconductors.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
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
Ae Ran Lim, Ma Byong Yoon
Summary: Understanding the physicochemical properties of NH2(CH3)(2)CdCl3 single crystal is crucial for its practical applications. The study reveals the thermal stability of NH2(CH3)(2)CdCl3 and the change in coordination geometry is attributed to the variation of the N-H center dot center dot center dot Cl hydrogen bond. In addition, C-13 in the cation exhibits better freedom compared to H-1. This study significantly contributes to the fundamental understanding of organic-inorganic hybrid materials for practical solar cell applications.
Article
Chemistry, Physical
Lei Huang, Man Wang, Lichun Cheng, Shunkang Pan, Qingrong Yao, Huaiying Zhou
Summary: Rare-earth orthoferrites (RFeO3) are emerging as a type of microwave absorbing material (MAM) with great potential due to their excellent structural stability and moderate permittivity. In this study, La1-xCaxFeO3 ferrite MAMs were synthesized using a sol-gel technology, showing that an appropriate amount of Ca doping can enhance the microwave absorption of LaFeO3. The ideal microwave absorption was achieved when Ca content x = 0.1 and 0.15, demonstrating the potential of La1-xCaxFeO3 as a high-performance MAM.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Bo Chen, Hao Chen, Shaobin Zhang, Yaoguo Shen
Summary: Birefringent crystal is a significant photoelectric functional material used extensively in laser and optical fields. The study on Pb-Br-Cs series crystals reveals that only the layered perovskite Cs2Pb4Br10 exhibits a large birefringence.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Ae Ran Lim, Sun Ha Kim
Summary: Organic-inorganic hybrid compounds have diverse applications and have gained significant attention in recent years. This study determined the structure, phase transition temperature, and thermal stability of [NH3(CH2)(6)NH3]ZnCl4 crystals, and observed the changes in chemical properties in response to temperature changes.
Article
Chemistry, Physical
Patricija Hribar Bostjancic, Matija Tomsic, Andrej Jamnik, Darja Lisjak, Alenka Mertelj
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Optics
Takuya Naruta, Takuya Akita, Yoshiaki Uchida, Darja Lisjak, Alenka Mertelj, Norikazu Nishiyama
Article
Chemistry, Multidisciplinary
Saso Gyergyek, Darja Lisjak, Milos Bekovic, Miha Grilc, Blaz Likozar, Marijan Necemer, Darko Makovec
Article
Chemistry, Multidisciplinary
Darja Lisjak, Patricija Hribar Bostjancic, Alenka Mertelj, Andraz Mavric, Matjaz Valant, Janez Kovac, Hermina Hudelja, Andraz Kocjan, Darko Makovec
Article
Chemistry, Analytical
Darja Lisjak, Masa Vozlic, Uliana Kostiv, Daniel Horak, Boris Majaron, Slavko Kralj, Irena Zajc, Lovro Ziberna, Maja Ponikvar-Svet
Summary: The increasing interest in upconverting nanoparticles (UCNPs) in biodiagnostics and therapy has led to the development of biocompatible UCNPs platforms. This study investigated the effect of different phosphonate coatings on the chemical stability and cytotoxicity of Yb3+, Er3+-codoped NaYF4 UCNPs. The results showed that phosphonate coatings prepared at 80 degrees C significantly improved the chemical stability of UCNPs and reduced their cytotoxicity.
METHODS AND APPLICATIONS IN FLUORESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Jelena Papan Djanis, Grisa Grigorij Princic, Andraz Mavric, Alenka Mertelj, Jernej Iskra, Darja Lisjak
Summary: This study aimed to amino-functionalize the surfaces of barium hexaferrite nanoplatelets (NPLs) in order to achieve new materials and applications. Two different amine ligands were selected, and the effect of anchoring group, backbone structure, and processing conditions on the formation of surface coatings was studied. The results demonstrated that efficient amino-functionalization can be achieved by using two different methods.
Article
Chemistry, Physical
Ziga Gregorin, Nerea Sebastian, Natan Osterman, Patricija Hribar Bostjancic, Darja Lisjak, Alenka Mertelj
Summary: Ferrofluids are colloidal suspensions of magnetic nanoparticles that exhibit ferromagnetic ordering at specific concentrations. By optimizing fundamental interactions, the threshold concentration for nematic ordering can be reduced, allowing reproducible and controllable analysis of magnetic domain structures. The effect of an external magnetic field on the fluctuations of the nematic director inside a domain has also been studied.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Optics
Vedran Budinski, Simon Pevec, Stanislav Campelj, Alenka Mertelj, Darja Lisjak, Denis Donlagic
Summary: This Letter describes a miniature Fabry-Perot, contactless, magneto-optic sensor for angular position measurement, which utilizes a magneto-optic fluid and a compact fiber-optic sensor system. An efficient temperature compensation system is provided. Experimental results demonstrate an unambiguous measurement range of 90 degrees and a resolution better than 0.05 degrees.
Article
Biophysics
Jelena Papan Djanis, Jovana Perisa, Patricija Hribar Bostjancic, Katarina Mihajlovski, Vesna Lazic, Miroslav Dramicanin, Darja Lisjak
Summary: Colloidal stabilization is crucial for the preparation of magnetic nanoparticles for biomedical applications. In this study, tannic acid was used as a coating for barium hexaferrite nanoplatelets (BSHF NPLs) to achieve stability in aqueous media. The coated BSHF NPLs were characterized and their magnetic properties were measured. The stable colloids were tested in biological media, and the antimicrobial properties were examined. To enhance antimicrobial activity, tannic acid was used as a platform for the in-situ production of silver on BSHF NPLs. The hybrid material exhibited magnetic properties and excellent antimicrobial activity against Escherichia coli and Staphylococcus aureus.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Stanislav Campelj, Matic Pobreznik, Tomas Landovsky, Janez Kovac, Layla Martin-Samos, Vera Hamplova, Darja Lisjak
Summary: In this study, MNPs were successfully functionalized with CAT, GAL, CAF, and NDA at different pH values. The functionalized MNPs showed higher saturation magnetizations (M-s) compared to the starting material. XPS analyses confirmed the presence of Fe(III) ions on the surface, ruling out the formation of magnetite. DFT calculations demonstrated that the adsorption of catechols did not affect the M-s. The increase in the average size of the MNPs and the decrease in the fraction of the smallest MNPs explained the observed increase in M-s values.
Article
Chemistry, Physical
Hajnalka Nadasi, Melvin Kuester, Alenka Mertelj, Nerea Sebastian, Patricija Hribar Bostjancic, Darja Lisjak, Thilo Viereck, Margaret Rosenberg, Alexey O. Ivanov, Sofia S. Kantorovich, Alexey Eremin, Frank Ludwig
Summary: The study investigates the influence of electrostatic interactions on the dynamical response in dispersions of magnetic nanoplatelets, and finds that tuning the interactions with an ionic surfactant leads to new dynamic modes in magnetic response spectra. The collective modes can be induced or suppressed by varying the concentration ratio of the nanoplatelets to the surfactant or increasing the nanoplatelet concentration, reflecting the nanoscale characteristics of this fluid magnet.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Masa Vozlic, Tina Cernic, Saso Gyergyek, Boris Majaron, Maja Ponikvar-Svet, Uliana Kostiv, Daniel Horak, Darja Lisjak
Summary: In this study, protective phosphonate coatings were formed on cubic NaYF4 nanoparticles and hexagonal Yb3+,Er3+-doped upconverting NaYF4 nanoparticles. The quality of the coatings and their ability to prevent dissolution were examined, showing that synthesizing the coatings at 80 degrees Celsius significantly increased their protective effects and suppressed surface quenching of upconversion fluorescence in beta-UCNPs.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
D. Makovec, G. Drazic, S. Gyergyek, D. Lisjak
Article
Chemistry, Physical
Tanja Gorsak, Mitja Drab, Dejan Krizaj, Marko Jeran, Julia Genova, Slavko Kralj, Darja Lisjak, Veronika Kralj-Iglic, Ales Iglic, Darko Makovec
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2020)
Article
Chemistry, Physical
Alenka Mertelj, Borut Lampret, Darja Lisjak, Juergen Klepp, Joachim Kohlbrecher, Martin Copic
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)