Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Kohei Shima"'
Autor:
Kohei Shima, Tin S. Cheng, Christopher J. Mellor, Peter H. Beton, Christine Elias, Pierre Valvin, Bernard Gil, Guillaume Cassabois, Sergei V. Novikov, Shigefusa F. Chichibu
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-8 (2024)
Abstract Cathodoluminescence (CL) spectroscopy is a suitable technique for studying the luminescent properties of optoelectronic materials because CL has no limitation on the excitable bandgap energy and eliminates ambiguous signals due to simple lig
Externí odkaz:
https://doaj.org/article/d9f906e2499b4a14b6b4e72c9ecf4f02
Autor:
Akira Uedono, Ryo Tanaka, Shinya Takashima, Katsunori Ueno, Masaharu Edo, Kohei Shima, Kazunobu Kojima, Shigefusa F. Chichibu, Shoji Ishibashi
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
Abstract A process for activating Mg and its relationship with vacancy-type defects in Mg-implanted GaN were studied by positron annihilation spectroscopy. Mg+ ions were implanted with an energy of 10 keV, and the Mg concentration in the subsurface r
Externí odkaz:
https://doaj.org/article/872ed79336d94b0583d3cbbb01e7330f
Autor:
Noboru Sato, Yasuyuki Fukushima, Kohei Shima, Yuichi Funato, Takeshi Momose, Mitsuo Koshi, Yukihiro Shimogaki
Publikováno v:
International Journal of Chemical Kinetics. 54:300-308
Autor:
Yasuyuki Fukushima, Kohei Shima, Yukihiro Shimogaki, Yuhei Otaka, Noboru Sato, Takeshi Momose, Yuichi Funato
Publikováno v:
ACS Applied Materials & Interfaces. 13:53009-53020
Conformal chemical vapor deposition (CVD) of silicon carbide (SiC) from methyltrichlorosilane (MTS) and hydrogen (H2) onto high-aspect-ratio (HAR; typically >100:1) three-dimensional features has been a challenge in the fabrication of ceramic matrix
Autor:
shozo kono, Kohei Shima, Shigefusa Chichibu, Masaru Shimomura, Taisuke Kageura, Hiroshi Kawarada
Publikováno v:
Diamond and Related Materials. 136:110013
Autor:
Kohei Shima, Yuhei Otaka, Noboru Sato, Yuichi Funato, Yasuyuki Fukushima, Takeshi Momose, Yukihiro Shimogaki
Publikováno v:
The Journal of Chemical Physics. 158:124704
The kinetics of heterogeneous nucleation during chemical vapor deposition (CVD) is still unclear despite its importance. Nucleation delay is often observed in many CVD processes, which is known as the incubation period ( τi). In this study, the effe
Autor:
Mitsuo Koshi, Kohei Shima, Yasuyuki Fukushima, Takeshi Momose, Hidetoshi Sugiura, Yukihiro Shimogaki, Noboru Sato, Yuichi Funato
Publikováno v:
International Journal of Chemical Kinetics. 53:638-645
Autor:
Kohei Shima, Takeshi Momose, Noboru Sato, Yuichi Funato, Yasuyuki Fukushima, Yukihiro Shimogaki
Publikováno v:
ACS Applied Materials & Interfaces. 12:51016-51025
We propose a new, concise method for conformal chemical vapor deposition (CVD) using sacrificial layers (SLs) to fill three-dimensional features with microscopic pores. SLs are porous membranes (e.g., ceramic felts) that filter film-forming species h
Self-formed compositional superlattices triggered by cation orderings in m-plane Al1−x In x N on GaN
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
Scientific Reports
Scientific Reports
Immiscible semiconductors are of premier importance since the source of lighting has been replaced by white light-emitting-diodes (LEDs) composed of thermodynamically immiscible InxGa1−xN blue LEDs and yellow phosphors. For realizing versatile deep
Autor:
Kohei Shima, Akira Uedono, Shoji Ishibashi, Katsunori Ueno, Masaharu Edo, Kazunobu Kojima, Shinya Takashima, Ryo Tanaka, Shigefusa F. Chichibu
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
Scientific Reports
Scientific Reports
A process for activating Mg and its relationship with vacancy-type defects in Mg-implanted GaN were studied by positron annihilation spectroscopy. Mg+ ions were implanted with an energy of 10 keV, and the Mg concentration in the subsurface region (