Article
Materials Science, Multidisciplinary
Taehyun Park, Daekwan Kim, Bongguen Shin, Jaehyun Hur, Hocheon Yoo
Summary: A rapid and efficient opto-electrical method for determining blood components using a tin oxide quantum dot fluorene copolymer heterojunction photodetector is demonstrated. The device shows remarkable responsivity, detectability, fast responses, and stability under self-powered operation. This technique provides a simple and efficient approach for emergency medical care and health monitoring systems.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Fan Jiang, Minjie Huang, Zejiang Chen, Yangyang Zhang, Yunbin He, Qingfeng Zhang
Summary: In this study, self-powered solar-blind ultraviolet photodetectors based on Ga2O3 were fabricated using a facile, effective, and low-cost sol-gel method. The addition of Sn increased the electron concentration in Ga2O3, leading to improved photoelectric performance. The resulting photodetectors exhibited a large responsivity and excellent detectivity at a light wavelength of 240 nm and 0 V bias.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Materials Science, Ceramics
Faran Baig, Ali Asif, Muhammad Waseem Ashraf, Hafiz Muhammad Fahad
Summary: This study involved the deposition of CaMgZnO thin films through sol-gel spin coating method for anti-icing applications. The films exhibited hexagonal wurtzite structure, crack-free surface, and high transmission rate. A maximum band gap value of 3.43 eV was observed, with the sample containing equal amounts of calcium and magnesium showing the best hydrophobicity. De-icing properties were evaluated with freezing onset at -15.1 degrees C and freezing delay times ranging from 900 to 630 seconds at different temperature set-points.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Min-Sung Bae, Ju-Won Lee, Jung-Hyuk Koh
Summary: The structural and optical properties of films with increasing high Gallium content were investigated. The films showed a multiphase crystal structure of rutile tetragonal and beta phase monoclinic. High Gallium incorporation led to differences in crystallite size and the appearance of multiple phases. The films had high transparency in the visible region. The band gap of the composite films was estimated using Tauc plot and measured using photoluminescence. The optimized sheet resistance value was obtained when the Gallium concentration was 20 mol%.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
M. M. Abdelrazek, Ahmed E. Hannora, Rasha M. Kamel, Ibrahim Morad, M. M. El-Desoky
Summary: The structural and optical properties of lanthanum oxide doped nanocrystalline vanadium pentoxide films were studied. The addition of lanthanum resulted in a noticeable (002) line and a decrease in crystallite size. Optical parameters such as absorption coefficient, refractive index, and optical band gap were calculated. The absorption coefficient increased slightly with increasing lanthanum content, and the optical band gap also increased.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
N. Cennamo, F. Arcadio, L. Noel, L. Zeni, O. Soppera
Summary: By utilizing a laser-based integration process of ultrathin metal-oxide films, we have enhanced the plasmonic effect in sensors based on plastic optical fibers. The use of MO films as intermediate layers improved sensor performance, particularly in terms of SPR sensitivity, and also led to the observation of an LMR phenomenon. The incorporation of both SPR and LMR resonances opens up opportunities for various application fields, such as biochemical sensing.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yiren Chen, Jiawang Shi, Zhiwei Zhang, Guoqing Miao, Hong Jiang, Hang Song
Summary: This paper proposes an AlGaN-based solar-blind UV heterojunction bipolar phototransistor (HBPT) with an AlGaN-based multiple quantum well (MQW) layer as the light absorption layer. The material growth, device preparation, and performance evaluation of the solar-blind UV HBPT are investigated in detail. The evaluations show that the fabricated phototransistor exhibits low dark current density, high responsivity, and quick transient response speed, supporting the feasibility of a high performance solar-blind UV photodetector based on the AlGaN-based MQW HBPT.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Mingsheng Long, Zhen Shen, Ruijie Wang, Qingsong Dong, Zhiyi Liu, Xin Hu, Jie Hou, Yuan Lu, Fang Wang, Dongxu Zhao, Fei Ding, Yubing Tu, Tao Han, Feng Li, Zongyuan Zhang, Xingyuan Hou, Shaoliang Wang, Lei Shan
Summary: This study presents an ultra-broadband photodetector based on a FePSe3/MoS2 heterostructure, which achieves high photoresponsivity and external quantum efficiency in the range from solar-blind ultraviolet to longwave infrared.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Physics, Condensed Matter
Seyda Horzum, Emel Bulduk, Deniz Sener, Tulay Serin
Summary: The study investigated the effects of doping with Indium, Gallium, and Aluminum on the structural, optical, and vibrational properties of ZnO thin films prepared by the sol-gel dip-coating method. Results showed changes in crystallite size and phonon modes upon doping, with dopant atoms effectively tuning the film's optical properties.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Engineering, Electrical & Electronic
Chun-Ying Huang, Lian-Kai Xiao, Yun-Hsiang Chang, Liang-Yu Chen, Guan-Ting Chen, Ming-Hsien Li
Summary: The study investigates the impact of UV/ozone optical-annealing treatment on ZnSnO (ZTO) metal-semiconductor-metal PDs, achieving a high responsivity of 11.3 A W-1, ultra-high photo-to-dark current ratio of 2090, and improved response speed with a decay time of 3.02 s. The research demonstrates the potential of utilizing UV/O-3 technique for developing In-free AOS for various electronic and optoelectronic devices.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Wei Zhang, Peng Li, Yuanzheng Li, He Chen, Xinnong Wang, Jiangang Ma, Xiangmin Zhao
Summary: In this study, Ga and F co-doped ZnO (GFZO) films with different F doping concentrations were successfully prepared using sol-gel spin-coating method. The structural, optical, and electrical properties of GFZO films were investigated. The results showed that increasing F doping concentration improved crystallinity, transmittance, and conductivity, and the GFZO film with 2 at.% F demonstrated the best performance.
Article
Materials Science, Ceramics
Yu-Kun Syue, Kuo-Chin Hsu, Te-Hua Fang, Chun- Lee, Chi-Jen Shih
Summary: In this study, zinc oxide (ZnO) nanofibers were prepared using the electrospinning method and combined with La0.8Sr0.2FeO3 (LSFO) perovskite film to create a ZnO/LSFO heterostructure gas sensor. The sensor showed a good sensing response to H2S gas and exhibited gas selectivity.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Applied
Yuxia Zhu, Yuewen Li, Xiangqian Xiu, Xinyu Sun, Zili Xie, Tao Tao, Peng Chen, Bin Liu, Jiandong Ye, Rong Zhang, Youdou Zheng
Summary: The effects of off-angled sapphire substrates on the surface morphology and crystal quality of beta-Ga2O3 films were systematically investigated. Larger off-angled sapphire substrates led to smoother surface morphology and higher crystal quality of beta-Ga2O3 films. The beta-Ga2O3 photodetectors fabricated on similar to 7 degrees off-angled sapphire substrate showed excellent optical characteristics.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Angela Mercedes Raba-Paez, Joao Otavio D. Malafatti, Carlos Arturo Parra-Vargas, Elaine Cristina Paris, Miryam Rincon-Joya
Summary: This study successfully synthesized CuO/CuWO4 heterostructure materials through a simple sol-gel method, with temperature control playing a crucial role. Characterization was conducted using various techniques, revealing 300 degrees Celsius as the optimal temperature for formation. Only the sample obtained at 300 degrees Celsius exhibited a photocatalytic response.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
Sueon Lee, Si Hyung Lee, Nuri On, Jae Kyeong Jeong
Summary: For portable and low-power flexible devices, metal-oxide (M - O) materials provide high performance, superior stability, and a low-cost printing process for mass production. This study investigated the effect of solution stirring temperature and H2O2 loading on lanthanum zirconium oxide (LZO) dielectric films, resulting in improved properties with increasing stirring temperature, such as low leakage current, high-breakdown electric field, and high permittivity. The synergetic interaction of oxygen radicals introduced by H2O2 during deep ultraviolet photochemical annealing played a key role in enhancing the structural and electrical properties of LZO dielectric films for printed flexible electronics.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Condensed Matter
Shinji Nakagomi, Satoru Kaneko, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2015)
Article
Physics, Applied
Yoshihiro Kokubun, Shohei Kubo, Shinji Nakagomi
APPLIED PHYSICS EXPRESS
(2016)
Article
Crystallography
Shinji Nakagomi, Shohei Kubo, Yoshihiro Kokubun
JOURNAL OF CRYSTAL GROWTH
(2016)
Article
Physics, Condensed Matter
Shinji Nakagomi, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2016)
Article
Materials Science, Multidisciplinary
Yoshihiro Kokubun, Yuta Amano, Yasuhiro Meguro, Shinji Nakagomi
Article
Materials Science, Multidisciplinary
Shinji Nakagomi, Keisuke Hiratsuka, Yoshinori Kakuda, Kokubun Yoshihiro
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2017)
Article
Crystallography
Shinji Nakagomi, Yoshihiro Kokubun
JOURNAL OF CRYSTAL GROWTH
(2017)
Article
Materials Science, Multidisciplinary
Shinji Nakagomi, Toshihide Sakai, Kentaro Kikuchi, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2019)
Article
Physics, Applied
Shinji Nakagomi, Toshihiro Momo, Syuhei Takahashi, Yoshihiro Kokubun
APPLIED PHYSICS LETTERS
(2013)
Article
Materials Science, Multidisciplinary
Shinji Nakagomi, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2013)
Article
Physics, Condensed Matter
Shinji Nakagomi, Satoru Kaneko, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2015)
Article
Chemistry, Analytical
Shinji Nakagomi, Tsubasa Sai, Yoshihiro Kokubun
SENSORS AND ACTUATORS B-CHEMICAL
(2013)
Article
Physics, Condensed Matter
Shinji Nakagomi, Takashi Yasuda, Yoshihiro Kokubun
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2020)
Article
Physics, Condensed Matter
Yoshihiro Kokubun, Shinji Nakagomi
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2020)
Article
Physics, Condensed Matter
Yoshihiro Kokubun, Masato Koyanagi, Shinji Nakagomi
Summary: The study found that heat treatment temperature and Li doping have significant effects on the structural properties of NiO epitaxial films, with undoped films showing increased lattice parameters and bandgap at higher treatment temperatures. Li doping reduces the increase in lattice parameter and bandgap observed at high heat treatment temperatures.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)