Article
Engineering, Electrical & Electronic
Katsuyuki Takagi, Kohei Toyoda, Hiroki Kase, Toshiyuki Takagi, Kento Tabata, Tsuyoshi Terao, Hisashi Morii, Akifumi Koike, Toru Aoki, Mitsuhiro Nogami, Keitaro Hitomi
Summary: This study introduces an X-ray imager using TlBr detectors and demonstrates its potential for imaging applications. The proposed imager, constructed using a combination of existing technologies, shows a high modulation transfer function (MTF) and highlights the need for further optimization of flat-panel detector processes to better suit TlBr detectors.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Wei-Yang Chou, Sheng-Kuang Peng, Fu-Hsuan Chang, Horng-Long Cheng, Jr-Jeng Ruan, Tsung-Yeh Ho
Summary: This study introduces Ni atom dopants and adjusts the growth temperature to achieve a series of ferromagnetic organic semiconductor (FOS) films with room-temperature ferromagnetic properties, one of which has a maximum coercivity of 257.6 Oe. The spin-exchange interaction between a Ni atom and a pentacene molecule is detected, supporting the development of new spintronic devices with structural flexibility and room-temperature ferromagnetism.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Guangqiang Mei, Wei Tan, Xingxia Cui, Cong Wang, Qing Yuan, Yafei Li, Cancan Lou, Xuefeng Hou, Mengmeng Zhao, Yong Liu, Wei Ji, Xiaona Zhang, Min Feng, Limin Cao
Summary: Researchers have achieved room-temperature ferromagnetism by doping Fe into SnSe. This ferromagnetic semiconductor has a large bandgap and may be applied in next-generation information device technologies, with the advantage of scalability for industrial production.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Physical
Xiaohua Fu, Xue Zhang, Chen Qian, Zhimin Ma, Zewei Li, Hong Jiang, Zhiyong Ma
Summary: In this study, a new phosphorescence unit named 5H-benzo[b]carbazole (BCz) is reported, which can achieve similar room-temperature ultralong phosphorescence (RTUOP) as 1H-Benzo[f]indole (Bd). BCz can be easily obtained via two steps of reactions, while the synthesis of Bd requires seven steps. BCz demonstrates remarkable photo-activated yellow ultralong phosphorescence at room temperature and its derivatives have longer phosphorescent lifetimes compared to Bd derivatives. Additionally, BCz and Bd share the same phosphorescence mechanism involving cation-radical and enhanced pi-pi interactions among BCz units result in the redshifted ultralong phosphorescence.
CHEMISTRY OF MATERIALS
(2023)
Article
Multidisciplinary Sciences
Horacio Coelho-Junior, Bruno G. Silva, Cilene Labre, Renan P. Loreto, Rubem L. Sommer
Summary: This study presents a method for synthesizing ZnSiN2 semiconductor on amorphous carbon substrates, which opens up possibilities for flexible electronics technologies and environmentally friendly semiconductor devices.
SCIENTIFIC REPORTS
(2021)
Review
Nanoscience & Nanotechnology
Lang-Xi Ou, Meng-Yang Liu, Li-Yuan Zhu, David Wei Zhang, Hong-Liang Lu
Summary: This article presents the recent research progress of metal oxide semiconductor-based room-temperature gas sensors and discusses the influence of various modified materials on the performance of gas sensors. The effect of light illumination on gas sensing performance and the applications and future perspectives of room-temperature gas sensors are also discussed.
NANO-MICRO LETTERS
(2022)
Article
Physics, Multidisciplinary
Yu-Zhang Jiao, Dmitry V. Louzguine-Luzgin, Ke-Fu Yao, Zheng-Jun Zhang, Na Chen
Summary: In this study, a magnetic semiconductor with a high Curie temperature is presented for the development of spintronic devices in next-generation computing systems. The semiconductor exhibits low resistivity and high saturation magnetization at room temperature, and forms a heterojunction with p-type silicon, showing rectifying characteristics. These findings provide design principles for high Curie temperature magnetic semiconductors with determined conduction types, which are crucial for realizing nonvolatile spin-based transistors in information technology beyond Si-based systems.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2023)
Article
Chemistry, Physical
Zhicheng Cai, Jiho Park, Sunghoon Park
Summary: A series of porous Au nanoparticles (NPs) decorated with In2O3 nanoparticles (NPs) was embedded in ZnO nanofibers (NFs) using electrospinning and calcination methods. The gas-sensing properties of the resulting sensors were evaluated and it was found that the addition of In2O3 improved the response properties. The sensor with 0.03 g In(NO3)3 (S2) showed excellent stability, selectivity, and a high response to NO2 gas under UV irradiation at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Wei-Yang Chou, Po-Hsiang Fang, Wen-Chieh Chiang, Horng-Long Cheng
Summary: We have successfully fabricated a magnetic semiconductor thin film composed of polymer and magnetic nanoparticles, and demonstrated strong spin coupling between the polymer molecules and the magnetic nanoparticles.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Jianbo De, Xuekai Ma, Fan Yin, Jiahuan Ren, Jiannian Yao, Stefan Schumacher, Qing Liao, Hongbing Fu, Guillaume Malpuech, Dmitry Solnyshkov
Summary: This research demonstrates a sub-nanosecond electrical field-enhanced polariton condensate switch at room temperature by applying an electric field to a microcavity filled with an organic microbelt. This provides the basis for developing an on-chip integrated photonic device in the strong light-matter coupling regime.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Leonardo Ranasinghe, Christian Heyn, Kristian Deneke, Michael Zocher, Roman Korneev, Wolfgang Hansen
Summary: This study investigates photoluminescence emission from self-assembled strain-free GaAs quantum dots in refilled AlGaAs nanoholes at and close to room temperature. Two major obstacles for room temperature operation are identified, and optimized sample designs and excitation wavelengths are shown to enable room temperature emission from the quantum dots.
Article
Engineering, Electrical & Electronic
Yu-Chuan Chiu, Moumita Deb, Po-Tsun Liu, Hsiao-Wen Zan, Yun-Ru Shih, Yue Kuo, Dun-Bao Ruan, Kai-Jhih Gan, Chih-Chieh Hsu
Summary: In this study, a WO3 semiconductor gas sensor was manufactured using a commercial process and successfully used for NO2 detection in parts-per-billion concentration at room temperature. The sensor showed high sensitivity, a wide detecting concentration range, and fast response/recovery. The influences of surface properties on the sensing response were investigated, and the sensor demonstrated good selectivity, stability, and nondecayed sensing after 14 days.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Review
Polymer Science
Vraj Shah, Jaydip Bhaliya, Gautam M. Patel, Priyanka Joshi
Summary: This review introduces innovative chemiresistive gas sensors with strong sensing qualities that operate at room temperature. To overcome the high power consumption and low selectivity of conventional high-temperature sensors, metal oxides doped with various nanostructures are used, which have advantages such as high surface-area-to-volume ratio, efficient electron transfer, improved and adjustable surface reactivity, and quick response and recovery time. The review also discusses the preparation of SnO2 nanowires and the sensing properties of tin oxide nanowire-based sensors, including response time, analytical ranges, and operating temperatures.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Long Truong Nguyen, Guy Makov
Summary: Using density functional theory calculations guided by an evolutionary algorithm, we investigated the structures of GeS beyond the orthorhombic alpha-Pnma phase. We discovered six new energetically stable structures at ambient conditions, which exhibit distinct electronic and optical properties compared to alpha-Pnma GeS. The band gaps of these new phases range from 0.39 to 1.59 eV, making them attractive for optoelectronic applications. Under compression, the preferred structure changes from alpha-Pnma to gamma-Pnma and then to a Cmcm-like structure at higher pressures. Finally, the stable phase at 70 GPa is cubic Pm (3) over barm, with the transition mechanism related to the delocalization of lone pairs.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiao-Cun Liu, Min Zhu, Sheng-Qing Xia
Summary: A series of Mg/Mn mixed intermetallic compounds Mg1-xMn2+xAs2 were successfully synthesized via metal flux reactions, exhibiting unique magnetic behavior and room-temperature ferromagnetism. Experimental results showed the presence of both ferromagnetic and antiferromagnetic interactions in these compounds, with spin-polarized density functional theory calculations confirming the magnetic ground state.
INORGANIC CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Will Koehler, Michael Streicher, Sean O'Neal, Zhong He
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2016)
Article
Engineering, Electrical & Electronic
Sean O'Neal, Zhong He, Charles Leak
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2018)
Article
Engineering, Electrical & Electronic
Sean O'Neal, Zhong He, Charles Leak, Hadong Kim, Leonard Cirignano, Kanai Shah
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2018)
Article
Engineering, Electrical & Electronic
N. J. Cherepy, Z. M. Seeley, S. A. Payne, P. R. Beck, O. B. Drury, S. P. O'Neal, K. Morales Figueroa, S. Hunter, L. Ahle, P. A. Thelin, T. Stefanik, J. Kindem
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2013)
Article
Engineering, Electrical & Electronic
Nerine J. Cherepy, Steve A. Payne, Benjamin W. Sturm, Owen B. Drury, Sean P. O'Neal, Peter A. Thelin, Kanai S. Shah, Rastgo Hawrami, Michael Momayezi, Brad Hurst, Arnold Burger, Brenden Wiggins, Pijush Bhattacharya, Lynn A. Boatner, Joanne O. Ramey
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2013)
Article
Engineering, Electrical & Electronic
Will Koehler, Zhong He, Crystal Thrall, Sean O'Neal, Hadong Kim, Leonard Cirignano, Kanai Shah
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2014)
Proceedings Paper
Engineering, Electrical & Electronic
Nerine J. Cherepy, Saphon Hok, Sean P. O'Neal, H. Paul Martinez, Patrick R. Beck, Robert D. Sanner, Owen B. Drury, Erik L. Swanberg, Stephen A. Payne, Charles R. Hurlbut
HARD X-RAY, GAMMA-RAY, AND NEUTRON DETECTOR PHYSICS XX
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
N. J. Cherepy, Z. M. Seeley, S. A. Payne, P. R. Beck, O. B. Drury, S. P. O'Neal, K. Morales Figueroa, S. Hunter, L. Ahle, P. A. Thelin, T. Stefanik, J. Kindem
2012 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE RECORD (NSS/MIC)
(2012)