Article
Nanoscience & Nanotechnology
Rafael Oliveira Fleming, Sofia Goncalves, Amin Davarpanah, Iliya Radulov, Lukas Pfeuffer, Benedikt Beckmann, Konstantin Skokov, Yang Ren, Tianyi Li, John Evans, Joao Amaral, Rafael Almeida, Armandina Lopes, Goncalo Oliveira, Joao Pedro Araujo, Arlete Apolinario, Joao Horta Belo
Summary: This study demonstrates that the size and strain tuning of LaFe11.4Mn0.27Si1.29Hx alloys through ball-milling effectively broadens the temperature range of negative thermal expansion and suppresses its peak.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Yige Du, Qilong Gao, Andrea Sanson, Hengli Xie, Yangming Hu, Gaojie Zeng, Juan Guo, Xiao Ren, Erjun Liang
Summary: This study demonstrates the expansion of the NTE temperature zone in Mg2P2O7-based bulk material by doping Cu atom on the Mg site. The NTE in Mg1.9Cu0.1P2O7 bulk material is found to be derived from the phase transition of alpha- and beta-phase. This work provides a way to optimize the negative thermal expansion property in phase transition typed materials.
RESULTS IN PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Nana Jing, Sheng Xu, Zhiqiang Wang, Guixin Wang
Summary: A novel method using ZrW2O8 material to modify silicon was proposed to decrease the volume changes during charging and discharging processes. The modified silicon showed excellent structural integrity and electrochemical performance, especially at elevated temperatures. Moreover, the reversible capacities of the modified silicon were significantly higher than that of unmodified silicon in various cycling processes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
P. S. Ghosh, I. Ponomareva
Summary: In this study, the response of three hybrid organic-inorganic perovskite materials to pressure was investigated using first-principles density functional theory calculations. It was found that all three materials exhibit negative linear compressibility above a critical pressure. The calculations revealed that under pressure, XO6 octahedra tilt significantly while -HCOO ligands remain relatively rigid, resulting in highly anisotropic mechanical properties and expansion along certain directions.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Niu Zhang, Jinghua Li, Xiaoshuai Kong, Mengting She, Peng Guo, Jingjing Sun, Peiling Yuan, Shuaipu Zang, Mingju Chao, Erjun Liang
Summary: Nb14W3O44, prepared using a solid-state method, exhibits a tetragonal structure and intriguing linear negative thermal expansion (NTE) properties. The NTE phenomenon is attributed to the vibrations of the bridge-site atoms, while lattice distortion and pores could also affect the thermal expansion performance in the bulk materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Physics, Applied
A. B. Batdalov, L. N. Khanov, A. V. Mashirov, V. V. Koledov, A. M. Aliev
Summary: The study found that in the Ni46Mn41In13 Heusler alloy, the magnetic contribution is dominant in total entropy change, and there is a significant difference in the magnetocaloric effect between heating and cooling processes.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Kei-Ichiro Murai, Norimasa Inoue, Tomoki Sawada, Yasushi Fujiwara, Toshihiro Moriga
Summary: In this study, Zr2-xTixWP2O12 (x = 0.05, 0.10, 0.15, 0.20) ceramics with high relative density were successfully obtained by adding 0-0.9 wt% MgO as a sintering aid. The influence of MgO amount and relative density on the coefficient of thermal expansion for Zr2-xTixWP2O12 was investigated. The results showed that doping of MgO does not affect the coefficient of thermal expansion, but it improves the sintering properties.
MODERN PHYSICS LETTERS B
(2023)
Article
Engineering, Electrical & Electronic
Sanjay Dutta, Vikas, Vijayakanth Thangavel, Parthapratim Munshi
Summary: A single-component organic material with bifunctional characteristics of ferroelectricity and NTE properties has been reported, showing uniaxial ferroelectricity and anisotropic NTE properties in various crystal forms. The material undergoes inter-conversion between different forms and exhibits unique thermal behavior below room temperature.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Review
Materials Science, Multidisciplinary
Yuzhu Song, Naike Shi, Shiqing Deng, Xianran Xing, Jun Chen
Summary: The review summarizes the progress in magnetic NTE materials from Invar alloys to newly discovered materials like Mn-based antiperovskites, Laves phases, La(Fe, Si)13, Mn3Ge, R2Fe17, R(Fe,V)12, and R2Fe14B (R = rare earth elements). The NTE properties of magnetic materials can be controlled by adjusting magnetic exchange interaction through methods like chemical substitution, nanocrystallization, external field, and interstitial atoms. The main mechanisms of NTE of magnetic materials, including order-to-disorder transition, change of local moment, metamagnetic transition, short-range magnetic ordering, structural phase transition, and coexistence of magnetic phases, are summarized.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Qilong Gao, Sen Zhang, Yixin Jiao, Yongqiang Qiao, Andrea Sanson, Qiang Sun, Xinwei Shi, Erjun Liang, Jun Chen
Summary: In this study, a new negative thermal expansion (NTE) material, CaSnF6, was synthesized by solvothermal method for the first time. The XRD and Raman spectroscopy results showed a phase transition from rhombohedral to cubic structure at about 200 K, accompanied by a significant isotropic NTE effect in the cubic phase. Lattice dynamics calculations revealed that the NTE is attributed to the transverse vibration of fluorine atoms excited by low-frequency phonons. This work not only expands the NTE family of fluorides, but also provides a new facile and low-cost fabrication method for NTE fluorides.
Article
Materials Science, Multidisciplinary
D. P. Kozlenko, O. N. Lis, S. E. Kichanov, E. V. Lukin, N. M. Belozerova, B. N. Savenko
Summary: The study presents experimental evidence of negative thermal expansion and strong spin-phonon coupling effects in the two-dimensional van der Waals material CrBr3, caused by the long-range ferromagnetic order. Anomalous temperature variation of lattice parameters and vibrational modes as well as unusual broadening of the modes below the Curie temperature (TC) were observed through neutron, X-ray diffraction and Raman spectroscopy measurements.
NPJ QUANTUM MATERIALS
(2021)
Review
Chemistry, Inorganic & Nuclear
Naike Shi, Yuzhu Song, Xianran Xing, Jun Chen
Summary: Negative thermal expansion (NTE) is a counterintuitive phenomenon where unit cell volume of materials contracts upon heating. Framework structure materials, with flexible bridging units and large voids, facilitate transverse atomic vibrations leading to NTE. The magnitude of NTE is influenced by framework size and metal atom size, and can be controlled through chemical substitution, local structure distortion, and guest molecular or ion intercalation.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
Yingzhu Zi, Zhengwen Yang, Zan Xu, Xue Bai, Asad Ullah, Imran Khan, Asif Ali Haider, Jianbei Qiu, Zhiguo Song, Yuehui Wang, Yangke Cun
Summary: In this study, upconversion luminescence of rare earth ions in negative and positive thermal expansion hosts was investigated for temperature sensing applications. The results showed that the luminescence behavior varied with temperature, offering potential for novel temperature sensing devices using a mixed phosphor approach.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Qingshan Xie, Fanghui Lou, Xuejia Luo, Huming Hao, Mengyao Wang, Guan Wang, Jianyue Chen, Yuting Xie, Guixin Wang
Summary: By modifying the NCA electrode with orthorhombic Al-2(WO4)(3), the electrochemical performance and safety of NCA can be greatly improved, including rate performance, cyclability, thermal stability, and interface behavior.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Environmental
Wenyuan Zhang, Lang He, Yongxiao Zhou, Dongyan Tang, Bin Ding, Chang Zhou, Paul J. Dyson, Mohammad Khaja Nazeeruddin, Xin Li
Summary: In this study, a novel negative thermal expansion (NTE) material is introduced into perovskite film for the first time, leading to the growth of high-quality perovskite films with improved stability. This results in a champion power conversion efficiency of 22.40% and excellent thermal and light stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Mohit Sood, Jakob Bombsch, Alberto Lomuscio, Sudhanshu Shukla, Claudia Hartmann, Johannes Frisch, Wolfgang Bremsteller, Shigenori Ueda, Regan G. Wilks, Marcus Baer, Susanne Siebentritt
Summary: In devices based on Zn(O,S)/CuInS2, interface recombination is mainly caused by defects near the interface rather than unfavorable energy-level alignment or Fermi-level pinning. Research has shown that the dominant recombination channel is present at the Zn(O,S)/CuInS2 interface.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Ryosuke S. S. Maki, Shunta Matsumura, Sota Kida, Tomoyuki Maeda, Hatsuo Taira, Yoshihiro Kusano
Summary: This paper describes the formation mechanism of monophasic Al3BC3 powder with hexagonal plate-like morphology using Al, B4C, and C powders in a stoichiometric ratio. The results show that there is no vaporization of the powder mixture during heating in a high-purity argon atmosphere. The phases and particle morphology of Al3BC3 strongly depend on the mixing conditions before heating.
INORGANIC CHEMISTRY
(2022)
Article
Physics, Applied
Masaya Morita, Keiji Ishibashi, Kenichiro Takahashi, Shigenori Ueda, Jun Chen, Kota Tatejima, Toyohiro Chikyow, Atsushi Ogura, Takahiro Nagata
Summary: The effects of reactive gas flow conditions on the growth of nonpolar AlN films were investigated. It was found that low-temperature growth prevents unintentional nitridation and results in the crystallization of nonpolar AlN. Additionally, an appropriate N-2 flow improves the crystallinity and reduces defects, suppressing reactions at the interface.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Hajime Yamamoto, Sachiko Kamiyama, Ikuya Yamada, Hiroyuki Kimura
Summary: This study investigates the V-V dimerization phenomenon in the 3d(1) honeycomb lattice system, revealing the formation of V-V direct bonds in ilmenite-type MgVO3 and the ladderlike pattern observed at temperatures below 500 K. The dimerization is accompanied by a magnetic-to-nonmagnetic transition, with a possible valence bond liquid phase existing at 500-600 K, highlighting the behavior of valence electrons in the 3d(1) honeycomb lattice system.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yuichi Okazaki, Seiji Oda, Akihiko Takamatsu, Shogo Kawaguchi, Hirofumi Tsukasaki, Shigeo Mori, Shunsuke Yagi, Hidekazu Ikeno, Ikuya Yamada
Summary: The rational design of highly active catalysts for the oxygen evolution reaction (OER) is important for energy-conversion applications. Postspinel-structured oxides, CaB2O4, exhibit higher OER activities due to their lower charge-transfer resistances. A density-functional-theory calculation suggests a novel mechanism of lattice oxygen pairing with adsorbed oxygen, which results in the lowest theoretical OER overpotential.
Article
Chemistry, Physical
Takeshi Uyama, Yuichi Okazaki, Shogo Kawaguchi, Ikuya Yamada
Summary: Perovskite-related oxides containing Fe and Co ions can serve as catalysts for the oxygen evolution reaction, and the synergistic effect of Fe-Co mixing can enhance their catalytic activity. This study provides an effective strategy to further enhance the catalytic activity of complex transition metal oxides.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Physics, Applied
Hajime Yamamoto, Sachiko Kamiyama, Takumi Nishikubo, Masaki Azuma, Ikuya Yamada, Hiroyuki Kimura
Summary: This paper reports a significant negative thermal expansion (NTE) in an ilmenite-type MgVO3 ceramic. The study demonstrates that controlling the chemical bonding is a promising method for the creation of NTE materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Inorganic & Nuclear
Sachiko Kamiyama, Ikuya Yamada, Masayuki Fukuda, Yuichi Okazaki, Takashi Nakamura, Takumi Nishikubo, Masaki Azuma, Hiroyuki Kimura, Hajime Yamamoto
Summary: The nature of chemical bonds determines the electronic and magnetic properties of compounds. This study focused on the metal-metal bonding (V-V dimer) and its effect on the magnetism of ilmenite-type CoVO3. The presence of V-V dimers was found to alter the crystal structure symmetry and change the magnetic ground state.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Ikuya Yamada, Fumito Toda, Shogo Kawaguchi, Shunsuke Yagi
Summary: This study investigates the physical and electrochemical properties of BaFe12-xCoxO19 solid solution and its catalytic activity in the oxygen evolution reaction (OER). Co and Fe doping into BaFe12O19 and BaCo12O19 increases the OER activity, with maximum activity observed at x = 5 and 10 compositions. The nonsystematic change in activity for intermediate compositions suggests a competition of factors affecting OER activity.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wei Liu, Kodai Kawano, Masao Kamiko, Yuta Kato, Yuichi Okazaki, Ikuya Yamada, Shunsuke Yagi
Summary: The quadruple perovskite ruthenate CaCu3Ru4O12 exhibits higher activity and stability than RuO2 in the oxygen evolution reaction (OER) in acidic aqueous solutions. The crystal structure and cation type of the quadruple perovskite ruthenate influence its activity and stability. This research provides a good design principle for OER catalysts with high activity and stability in severely acidic aqueous solutions.
Article
Chemistry, Inorganic & Nuclear
Yoshihiro Kusano, Taiki Furuta, Ryosuke Maki, Tomoyuki Ogawa, Tatsuo Fujii
Summary: In this study, a supersaturated spinel solid solution compound was prepared and its decomposition and oxidation processes were investigated, revealing the formation of a unique grid-like microstructure and enhancement of magnetization.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Sachiko Kamiyama, Terutoshi Sakakura, Hiroyuki Kimura, Hajime Sagayama, Shunji Kishimoto, Ikuya Yamada, Hajime Yamamoto
Summary: We successfully obtained high-quality single-domain crystals of ilmenite-type MnVO3 under high-pressure and high-temperature conditions. The crystal growth occurred without fluxes or water, unlike conventional single crystal growth methods. Crystal structure refinement revealed the existence of V-V dimers and a structural phase transition from rhombohedral to triclinic ilmenite-type structures.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Wei Liu, Masao Kamiko, Ikuya Yamada, Shunsuke Yagi
Summary: This study investigates the effects of cation vacancies at tetrahedral sites on the catalytic activity of cobalt spinel oxides for the oxygen evolution reaction (OER). The results show that a certain degree of cation vacancies at tetrahedral sites can effectively enhance the activity of less active cobalt ions, providing an important basis for future catalyst design.
MATERIALS ADVANCES
(2022)
Article
Materials Science, Ceramics
Zeliang Peng, Hiroyuki Nakata, Ryosuke Maki, Minoru Fukuhara, Yoshihiro Kusano
Summary: Bizen stoneware shows a purplish red color called shiso when fired in a firewood kiln due to the reaction between Bizen clay and K from the firewood forming a thin hematite layer. Similar colored samples can be prepared by annealing Bizen clay pellets with K2CO3 at high temperature in a gas mixture.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Wei Liu, Masao Kamiko, Ikuya Yamada, Shunsuke Yagi
Summary: This paper presents an electrochemical deposition method to obtain cobalt oxides with controllable crystallinity on carbon paper. The study investigates the influence of the crystallinity of cobalt oxides on the activity of the oxygen evolution reaction (OER). The results show that cobalt oxides in an amorphous state exhibited higher catalytic activity and better stability compared to those in a crystalline state.
