Article
Engineering, Electrical & Electronic
Kazuki Shimazoe, Hiroyuki Nishinaka, Keisuke Watanabe, Masahiro Yoshimoto
Summary: In this study, rh-ITO thin films with different Sn concentrations were successfully grown using the mist chemical vapor deposition method. The films exhibited low resistivity, high transmittance, and can be used as transparent conductive oxide materials.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Xiongjie Li, Pingjuan Niu, Pingfan Ning, Yong Jiang
Summary: An ultra-flat heteroepitaxy α-Ga2O3 thin film, with a root mean square (RMS) roughness of 0.309 nm and high crystallinity, was successfully obtained on a c-plane sapphire substrate using mist chemical vapor deposition. The growth rate was calculated as 13.22 nm min(-1) and the bandgap of the transparent film was determined to be 5.10 eV. This high quality, wide bandgap heteroepitaxy α-Ga2O3 thin film represents a significant advancement for the preparation of high power and optoelectronic devices.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yu Xu, Yaolin Cheng, Zhe Li, Dazheng Chen, Shengrui Xu, Qian Feng, Weidong Zhu, Yachao Zhang, Jincheng Zhang, Chunfu Zhang, Yue Hao
Summary: This study successfully epitaxially grew high-quality beta-Ga2O3 single crystal films on sapphire substrates using a low-cost method and fabricated deep ultraviolet solar-blind photodetectors with excellent photoelectric performance.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Physical
Ryuto Horie, Hiroyuki Nishinaka, Daisuke Tahara, Masahiro Yoshimoto
Summary: Alloying γ-Ga2O3 with γ-aluminum oxide effectively achieves lattice-matched growth and band gap engineering, leading to a band gap energy of 5.88 eV. The epitaxial growth of γ-(AlxGa1-x)2O3 on spinel substrates demonstrated limited dislocations and band gap engineering capabilities in the range of 5.0-6.0 eV, showing promise for wide band gap semiconductor applications in power switching devices and deep-ultraviolet optoelectronics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
P. R. Jubu, F. K. Yam, Pannan Kyesmen
Summary: The influence of ZnO layer thickness on Ga2O3/ZnO heterostructured nanocomposites was evaluated, showing that increasing thickness can enhance the concentration of photogenerated electron-hole pairs and improve carrier separation and transportation. This led to an increase in photocurrent density and resulted in different optical and structural properties.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Ha Young Kang, Habin Kang, Eunhye Lee, Gyeong Ryul Lee, Roy Byung Kyu Chung
Summary: By doping with Sn, the thermal stability of gallium oxide films can be enhanced, especially in the growth of kappa-Ga2O3. Increasing Sn concentration can suppress radiative recombination, although it is not correlated with crystal quality.
Article
Materials Science, Multidisciplinary
Benjamin M. Janzen, Piero Mazzolini, Roland Gillen, Vivien F. S. Peltason, Linus P. Grote, Janina Maultzsch, Roberto Fornari, Oliver Bierwagen, Markus R. Wagner
Summary: Gallium oxide (Ga2O3) is a wide bandgap material with potential applications in power electronics and photodetectors. The orthorhombic kappa phase is of particular interest for its ferroelectric behavior and potential for high-quality electron gases. Investigation into the phonon modes of the material provides insights into its crystal structure and vibrational properties.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Physics, Applied
Masahiro Kaneko, Hiroyuki Nishinaka, Kazutaka Kanegae, Masahiro Yoshimoto
Summary: Here, we demonstrate the coherent growth of beta-(Al x Ga1-x )(2)O-3 thin films on a (010) beta-Ga2O3 substrate using mist chemical vapor deposition. The thin films exhibited high-crystalline quality and coherent growth, with an Al content of 18.3% measured by Rutherford backscattering spectroscopy. Importantly, the coherently grown thin films had atomically flat surfaces based on their surface morphologies. These findings suggest that mist chemical vapor deposition is a promising technique for beta-(Al x Ga1-x )(2)O-3/beta-Ga2O3 heterojunction devices.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ray-Hua Horng, Dong-Sing Wuu, Po-Liang Liu, Apoorva Sood, Fu-Gow Tarntair, Yu-Hsuan Chen, Singh Jitendra Pratap, Ching -Lien Hsiao
Summary: In this study, monoclinic gallium oxide (beta-Ga2O3) epilayer was successfully grown on a sapphire substrate by MOCVD. Controlling the growth temperature, TEGa flow rate, and growth time improved the crystallization characteristics of the epilayers. However, it also increased the surface roughness of beta-Ga2O3 film. The growth mechanism and chemical reactions between TEGa and oxygen precursors were analyzed.
MATERIALS TODAY ADVANCES
(2022)
Article
Nanoscience & Nanotechnology
Mahitosh Biswas, Hiroyuki Nishinaka
Summary: The translation elaborates on the properties and growth of gallium oxide (Ga2O3) and its metastable phases, and discusses their doping and electronic properties. The importance of these phases in power electronics and ultraviolet photodetectors is emphasized.
Article
Chemistry, Multidisciplinary
Asha Yadav, Bo Fu, Stephanie Nicole Bonvicini, Linh Quy Ly, Zhitai Jia, Yujun Shi
Summary: beta-Ga2O3 nanostructures with different morphologies, including nanowires, nanosheets, and nanorods, were successfully synthesized using thermally dewetted Au nanoparticles as catalysts. The growth of the nanostructures was found to be governed by different mechanisms, with the vapor-liquid-solid mechanism governing nanowire growth and the vapor-solid mechanism occurring in the growth of nanosheets and nanorods. The as-grown beta-Ga2O3 nanostructures exhibited high purity, wide bandgap, and strong photoluminescence emission, making them promising for applications in optoelectronic devices such as tunable UV-Vis photodetectors.
Article
Physics, Applied
Katie R. Gann, Celesta S. Chang, Ming-Chiang Chang, Duncan R. Sutherland, Aine B. Connolly, David A. Muller, Robert B. van Dover, Michael O. Thompson
Summary: Beta-phase gallium oxide (β-Ga2O3) is a promising semiconductor for high frequency, high temperature, and high voltage applications. The formation sequence of different phases during thermal annealing of amorphous thin films was investigated, revealing that the gamma-phase nucleates first and then transforms into the thermodynamically stable beta-phase at higher temperatures. These findings are critical for controlling practical devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Marika Ohta, Hiroto Tamura, Kazuyuki Uno
Summary: The growth mechanism and process of α-(AlGa)(2)O-3 alloys were investigated using mist chemical vapor deposition, and the contributions of acetylacetonated Al ions and the anchoring mechanism were evaluated.
APPLIED PHYSICS EXPRESS
(2022)
Article
Physics, Applied
Hitoshi Takane, Kentaro Kaneko, Yuichi Ota, Shizuo Fujita
Summary: The study compared the growth characteristics of α-Ga2O3 under different growth methods and revealed the unique mechanism of mist CVD-grown α-Ga2O3.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Weiqu Chen, Zimin Chen, Zeqi Li, Zeyuan Fei, Yanli Pei, Gang Wang, Zhiyuan He
Summary: High quality epsilon-phase gallium oxide (Ga2O3) thin films have been successfully grown on silicon substrates using metal-organic chemical vapor deposition (MOCVD). The growth pressure is found to be an important parameter that affects the thin film quality.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.