Article
Chemistry, Multidisciplinary
Matteo Ceppatelli, Demetrio Scelta, Manuel Serrano-Ruiz, Kamil Dziubek, Marta Morana, Volodymyr Svitlyk, Gaston Garbarino, Tomasz Poreba, Mohamed Mezouar, Maurizio Peruzzini, Roberto Bini
Summary: Chemical reactivity between As and N-2 leads to the synthesis of crystalline arsenic nitride under high pressure and temperature conditions. X-ray diffraction provides evidence for the formation of a covalent compound of AsN stoichiometry. Additional data indicate the existence of AsN at room temperature in a wide pressure range, with implications for pnictogens chemistry and the synthesis of advanced materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Andrey Aslandukov, Pascal L. Jurzick, Maxim Bykov, Alena Aslandukova, Artem Chanyshev, Dominique Laniel, Yuqing Yin, Fariia I. Akbar, Saiana Khandarkhaeva, Timofey Fedotenko, Konstantin Glazyrin, Stella Chariton, Vitali Prakapenka, Fabrice Wilhelm, Andrei Rogalev, Davide Comboni, Michael Hanfland, Natalia Dubrovinskaia, Leonid Dubrovinsky
Summary: A series of isostructural Ln(3)O(2)(CN3) compounds were successfully synthesized under high-pressure high-temperature conditions. The crystal structure of these compounds was determined and confirmed using SCXRD, XANES measurements, and DFT calculations. It was also found that the unit cell volumes and compressibility of the compounds were influenced by the lanthanide contraction phenomenon. Additionally, the stabilization of the CN35- guanidinate anion at ambient conditions provides new opportunities in inorganic and organic synthetic chemistry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Inorganic & Nuclear
Nishant N. Patel, Meenakshi Sunder
Summary: Results of high pressure Raman and ADXRD study on CsIBr2 show two phase transitions at 5 and 19 GPa, with bulk moduli of 10.9(8) GPa and 17.8(1) GPa for the orthorhombic and trigonal phases, respectively.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Abhinav Parakh, Mehrdad T. Kiani, Anabelle Colmenares, Andrew C. Lee, Guoyin Shen, Stella Chariton, Vitali B. Prakapenka, X. Wendy Gu
Summary: This study investigates the structural changes of Ni1-xBx metallic glass nanoparticles under high-pressure conditions using in situ high-pressure X-ray diffraction. The results show that the size and composition of the nanoparticles have an effect on their high-pressure behavior.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Congyan Zhang, Binbin Yue, Uttam Bhandari, Oleg N. Starovoytov, Yan Yang, David P. Young, Jinyuan Yan, Fang Hong, Shizhong Yang
Summary: High-entropy alloys (HEAs) have excellent mechanical properties, but the mechanism of their plastic deformation is not well understood. In this study, in situ experiments were conducted to investigate the compression deformation behavior of the HEA MoNbTaVW under high pressure, revealing a unique plastic behavior mechanism.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Applied
Sathyan Sandeep, Theo Threard, Elton De Lima Savi, Nikolay Chigarev, Alain Bulou, Vincent Tournat, Andreas Zerr, Vitalyi E. Gusev, Samuel Raetz
Summary: Time-domain Brillouin scattering (TDBS) uses ultrashort laser pulses to generate coherent acoustic pulses in solid samples, allowing for high-resolution imaging of material inhomogeneities at nanometer scales. Compared to x-ray computed tomography and classical spectroscopic methods, TDBS has clear advantages in imaging transparency samples with unlimited lateral sizes and thicknesses.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Lukas Bruening, Nityasagar Jena, Elena Bykova, Pascal L. Jurzick, Niko T. Flosbach, Mohamed Mezouar, Michael Hanfland, Nico Giordano, Timofey Fedotenko, Bjoern Winkler, Igor A. Abrikosov, Maxim Bykov
Summary: This study successfully synthesized antimony guanidinate under high pressure conditions and determined its crystal structure and properties. The discovery of the guanidinate anion marks a significant milestone in carbonitride chemistry and paves the way for the development of new inorganic nitridocarbonates.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Multidisciplinary
Lun Xiong, Bin Li, Fang Miao, Qiang Li, Guangping Chen, Jinxia Zhu, Yingchun Ding, Duanwei He
Summary: In this study, the high-pressure compression behavior of molybdenum was investigated using synchrotron radial x-ray diffraction technique. It was observed that a phase transition from a body-centered cubic structure to a rhombohedral structure occurred at around 27 GPa. The slope of the pressure-volume curve was found to be continuous before and after the phase transition, and the corresponding physical parameters were obtained.
Article
Crystallography
Maria Mora, Andriy Durygin, Vadym Drozd, Shanece Esdaille, Jiuhua Chen, Surendra Saxena, Xue Liang, Leonid Vasylechko
Summary: In this study, gadolinium aluminate perovskite (GdAlO3) was investigated at high pressures up to 23 GPa using monochromatic synchrotron X-ray powder diffraction. A pressure-induced phase transformation from orthorhombic to rhombohedral structure was observed at 21 GPa and confirmed by DFT calculations. The study also revealed a decrease in structural distortion due to the pressure-induced phase transition.
Article
Materials Science, Multidisciplinary
Maxim Bykov, Elena Bykova, Chris J. Pickard, Miguel Martinez-Canales, Konstantin Glazyrin, Jesse S. Smith, Alexander F. Goncharov
Summary: The study identified the structure of the high-pressure phase of molecular methane using single-crystal synchrotron x-ray diffraction, Raman spectroscopy, and first principles calculations. It revealed the relationship between the high-pressure phase and the previously documented phase B, and determined the positions of hydrogen atoms through calculations. The study's findings differ from previous proposals of multiple high-pressure phases based solely on Raman spectroscopy results.
Article
Chemistry, Inorganic & Nuclear
Zhenghao Zhao, Hiroyuki Kagi, Kazuki Komatsu, Keishiro Yamashita, Satoshi Nakano
Summary: Pressure-induced dehydration transitions of CoSO4·6H2O and CoSO4·7H2O were observed, transforming into a previously unreported high-pressure phase, CoSO4·5H2O, which was determined to have a triclinic structure consisting of [Co(H2O)6] and [Co(H2O)4(SO4)2].
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Xuejing He, Hiroyuki Kagi, Kazuki Komatsu, Satoshi Nakano
Summary: In-situ high-pressure experiments were conducted on magnesium hydroxyfluoride using synchrotron X-ray diffraction and Fourier transform infrared absorption spectroscopy. The study showed that no phase transition occurred during compression, and the hydrogen bond did not strengthen under pressure.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Geochemistry & Geophysics
Melinda J. J. Rucks, Gregory J. J. Finkelstein, Dongzhou Zhang, Przemyslaw K. K. Dera, Thomas S. S. Duffy
Summary: In this study, the behavior of a natural fluorapatite crystal under compression was examined. The results showed that the apatite structure remained stable up to 32.4 GPa, and then transformed into a triclinic phase at 35.6 GPa. The study extended the pressure range over which fluorapatite has been examined, providing new insights into its structural response to high-pressure conditions.
AMERICAN MINERALOGIST
(2023)
Article
Materials Science, Multidisciplinary
Linmao Qian, Zhuoyuan Liu, Shixue Guan, Jinxuan Bai
Summary: The high pressure structural transformation of 95W-3.5Ni-1.5Fe alloy was investigated using in-situ high pressure synchrotron radiate-on X-ray diffraction technique. The extreme compressive stress led to reversible structural evolution, with changes in grain size, atomic positions, bond distance, and unit cell volume. The study also revealed the structure responses of tungsten heavy alloy under high pressure and high temperature, as well as the formation and evolution of screw dislocations under various hydrostatic pressures.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Physics, Condensed Matter
Xinguo Hong, Matt Newville, Yang Ding
Summary: In this article, we present our recent approaches and advances in high-energy x-ray diffraction, high-pressure x-ray absorption fine structure, and ab initio first-principles density functional theory calculations and simulations using the local structure of network-forming GeO2 glass as an example. Our work sheds light on the origin of pressure-induced polyamorphism of GeO2 glass, and the Ge-[5] polyhedral units may be the dominant species in the densification mechanism of network-forming glasses from tetrahedral to octahedral amorphous structures.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Shuanghui Zeng, Xue Wang, Yunqian Zhang, Jiaojing Shao, Zhao Ding, Jie Zhao
Summary: A free-standing 3D core/shell composite material CNTs@Co9S8 on nickel mesh has been prepared using a simple two-step method. The composite material exhibits excellent conductivity and charge storage capability, making it a promising candidate for supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Marieta Belcheva, Georgi Georgiev, Boyko Tsyntsarski, Urszula Szeluga, Lyudmila Kabaivanova
Summary: This study successfully prepared new antibacterial materials by combining activated carbon with metal nanoparticles, taking advantage of the well-known antibacterial activity of metal nanoparticles. The obtained composites exhibited strong antibacterial effects against E. coli and S. aureus, with the antibacterial activity depending on the contact time, bacterial species, nature of the metal, and metal concentration. The findings provide novel materials with antibacterial properties for further development and potential application in hygiene devices.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
V. P. Madhurima, Kusum Kumari, P. K. Jain
Summary: In this study, carbon nanomaterials were synthesized using the arc discharge technique, with a focus on optimizing process parameters to improve yield and quality. The materials were characterized using various analytical tools, and their dye adsorption capabilities were evaluated. The results showed that carbon soot had better adsorption performance compared to carbon nanotubes, indicating the potential of these carbon nanomaterials for environmental remediation applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaolong Sun, Bo Cui, Pingping Liang, Qimeng Liu, Nan Gao, Hongdong Li
Summary: This study explores the potential of hafnium (Hf) terminated diamond surfaces in achieving negative electron affinity (NEA). By using swarm-intelligence structural search and first-principles calculations, the researchers found that Hf-terminated diamond surfaces exhibit stable NEA properties and high thermal stability, making them promising candidate materials for electron emission applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
N. Soltani, N. Tavakkoli, E. Eslami, L. S. Mirmohammadi
Summary: In this project, a carbon paste electrode modified with graphene and ZnFe2O4 spinel nanoparticles (Gr/ZnFe2O4/CPE) was used to measure naproxen, and various electrochemical methods were used to investigate its behavior. By optimizing the parameters, good measurement results were obtained.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xiwei Cui, Yue Qin, Xin Han, Huanyi Chen, Xinxin Ruan, Hui Zhang, Chengcheng Jiao, Rongqi Mao, Jinglin Hao, Sizhuang Zhao, Shuai Hou, Xiaoxuan Pian, Yandong Wang, Kazuhito Nishimura, Lifen Deng, Nan Jiang
Summary: This paper investigates the friction and wear behaviors of two types of polycrystalline diamonds against different materials. The results show that increasing surface roughness leads to an increase in coefficient of friction. The coefficient of friction and wear rate of ceramic Si3N4 balls are generally lower than those of steel GCr15 balls, except for one type of polycrystalline diamond. Transfer films of SiO2 and its hydrate are observed at the friction interface, which contribute to smoother friction and wear. Carbon-based transfer films are also identified, mainly catalyzed by residual cobalt in the polycrystalline diamonds, leading to a phase transformation.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Menglei Sun, Pengjun Li, Mao Wang, Yidan Liang, Xudong Yang, Shujie Pang
Summary: In this study, carbonized polymer dots were synthesized by a one-step hydrothermal method, and silver nanoclusters were synthesized by UV lamp irradiation. They were then self-assembled by electrostatic force to prepare a dual-emission fluorescent nanocomposite that responds to temperature changes. The nanocomposite showed two emission peaks and exhibited excellent linearity between 20°C and 80°C.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Mohamed J. Saadh, Durgesh Singh, Diego Mayorga, Anjan Kumar, Maria Albuja, Ahmad Ismael Saber, Mohammed Ahmed Mustafa, Yasser Elmasry, Noubu Sun
Summary: Based on density functional theory, it is found that the C3N monolayer has good adsorption capability for Hg0 and a short recovery time. This study suggests that the C3N monolayer is a promising adsorbent material for efficient control of gaseous mercury.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Rajendra Kumar Nare, Sivalingam Ramesh, Vijay Kakani, Yuvaraj Haldorai, Chandrasekaran Karthikeyan, Basivi Praveen Kumar, Nadavala Siva Kumar, Mohammad Asif, S. Naresh Kumar, D. Prakash Babu, K. Ramakrishna Reddy, Visweswara Rao Pasupuleti
Summary: This study examines the latest advancements in carbon nanotube (CNT) supercapacitors and related composites, aiming to identify strategies for enhancing their performance. The researchers used ultrasonication aided hydrothermal technique to synthesize a composite made of nitrogen doped carbon nanotubes and porous NiCo2O4 nanomaterial. The composite electrode exhibited excellent cycling stability and a rising specific capacitance, making it appealing for high-performance supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
D. Mary Deena, S. Arockia Anushya, A. Dhanusha, T. C. Sabari Girisun, A. Philominal
Summary: A single-beam Z-Scan experiment was conducted to investigate the nonlinear optical absorption and optical limiting properties of Bi2O3, rGO/Bi2O3, Bi2O3/WO3, and rGO/Bi2O3/WO3 nanostructures. The results showed that the synthesized nanostructures exhibited varying levels of nonlinear absorption, with bismuth-based nanostructures showing the lowest optical limiting threshold and a higher two-photon absorption coefficient. The presence of rGO contributed to the extended conjugation for charge transfer, while the strong UV-Visible absorption of Bi2O3 and WO3 led to a unique nonlinear optical response.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Weibing Guo, Yiren Hu, Tao Wang, Xiaoguang Chen
Summary: This study investigated the microstructure and forming mechanism of graphite/copper joints that were brazed using Ti-containing filler. The results showed that increasing the brazing temperature improved the heat transfer and tensile properties of the composites. Additionally, the composites exhibited high heat flux and faster heating rate compared to copper and aluminum.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ming Li, ZhiWen Wang, Yu Teng, Hongyu Zhao, Bowei Li, Yang Liu, Shengxue Wang, Zhenze Yang, Liangchao Chen, Hongan Ma, Xiaopeng Jia
Summary: In the experiment, different Ni-content catalysts were used to synthesize diamond crystals, and the properties of the synthesized diamonds were analyzed. The results revealed that the Ni content in the catalyst affects the crystallinity of diamond crystals and the nitrogen crystallinity. The photoluminescence spectroscopy also showed that the diamond synthesized by using Fe-containing catalyst has specific NV-color center structure.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Ling-Feng Mao
Summary: This study proposes an LSTM model to predict the work function of adsorbed metal atoms on graphene, which can quickly screen surface structures with target work function, saving computing and time costs, and improving device performance.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Runzhou Xu, Yinshui Liu, Qian Cheng, Zhenyao Wang, Kai Ma, Peiling Ke, Yipan Deng
Summary: The wear resistance of 17-4PH stainless steel was significantly improved by depositing multi-layered Cr/CrC/DLC coating at wide temperature range. The coating exhibited excellent lubrication and protective properties, and the wear mechanism changed with increasing temperature. The tribochemical reaction during the wear process played a crucial role in the graphitization transformation and friction properties of the coating.
DIAMOND AND RELATED MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xilong Guo, Jiaxin Song, Shanling Wang, Li Lei, Omololu Odunmbaku, Ayoub Taallah, Yi He, Aiqun Gu, Filippo S. Boi
Summary: The recent observations of superconductive-ordering in carbon-based systems consisting of rhombohedral stacking-faults, trilayer graphene (ABC-stacks) or dislocation-rich interfaces (pyrolytic graphite) have attracted significant attention. In this study, an unusual nucleation of rhombohedral stacking-faults in low-dimensional systems comprising of multiwall carbon nanotube (CNT) buckypapers was reported. The presence of sulfur doping resulted in a broad-band at the Raman shift from 1800 to 2000 cm(-1), indicating contributions arising from disorder-rich regions with rhombohedral stacking-order (ABC-stacks). These observations were further supported by X-ray diffraction and Rietveld refinements.
DIAMOND AND RELATED MATERIALS
(2024)