Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Yasuyuki Kowaka"'
Autor:
Tomoyuki Mihara, Kosuke Nozaki, Yasuyuki Kowaka, Mengtian Jiang, Kimihiro Yamashita, Hiroyuki Miura, Satoshi Ohara
Publikováno v:
Nanomaterials, Vol 14, Iss 2, p 171 (2024)
Titania (TiO2) nanosheets are crystals with controlled, highly ordered structures that improve the functionality of conventional TiO2 nanoparticles. Various surface modification methods have been studied to enhance the effectiveness of these material
Externí odkaz:
https://doaj.org/article/3d0a99812ffc45ec9414f1789528b048
Autor:
Yasuyuki Kowaka, Kosuke Nozaki, Tomoyuki Mihara, Kimihiro Yamashita, Hiroyuki Miura, Zhenquan Tan, Satoshi Ohara
Publikováno v:
Materials, Vol 16, Iss 3, p 1229 (2023)
TiO2 nanosheets have been studied as photocatalysts in various fields, and their performance has been actively improved. Herein, we prepared titania nanosheets with a smaller size than those reported previously with a side length of 29 nm and investi
Externí odkaz:
https://doaj.org/article/03f37dd47aa443c289445d2e9c5e74c1
Autor:
Takaya Yamanaka, Yasuyuki Kowaka, Umpei Nagashima, Masaaki Baba, Norifumi Ozawa, Takayoshi Ishimoto, Naofumi Nakayama
Publikováno v:
Chemical Physics. 400:178-184
Fluorescence excitation spectra and fluorescence lifetimes at single vibronic levels in the S 1 state have been observed for jet-cooled pyrene. The fluorescence lifetimes at the zero-vibrational levels of the S 1 1 B 3 u states of pyrene- h 10 and py
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1d58a4bc2d68d9bc904948826f1ec05
https://doi.org/10.1016/j.chemphys.2012.04.004
https://doi.org/10.1016/j.chemphys.2012.04.004
Autor:
Takaya Yamanaka, Yasuyuki Kowaka, Masaaki Baba, Umpei Nagashima, Nobuyuki Nishi, Naofumi Nakayama, Yoshitake Suganuma, Tadashi Ueda, Takayoshi Ishimoto, Noritaka Ashizawa, Hitoshi Goto
Publikováno v:
Molecular Physics. 109(14):1831-1840
We observed fluorescence excitation spectra and dispersed fluorescence spectra for single vibronic level excitation of jet-cooled perylene-h 12 and perylene-d 12, and carefully examined the vibrational structures of the S0[1] A g and S1[1] B 2u state
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69c379062aaa0c2babb3d61ab2c3a8df
http://hdl.handle.net/2433/158744
http://hdl.handle.net/2433/158744
Autor:
Yasuyuki Kowaka, Umpei Nagashima, Yoshitake Suganuma, Masaaki Baba, Naofumi Nakayama, Takayoshi Ishimoto, Hitoshi Goto, Noritaka Ashizawa
Publikováno v:
Journal of Molecular Spectroscopy. 260:72-76
A rotationally resolved ultrahigh-resolution fluorescence excitation spectrum of the S1 ˆ S0 transition of perylene has been observed using a collimated supersonic jet technique in conjunction with a single-mode UV laser. We assigned 1568 rotational
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10dfd268470dfd23579bbd097b2c8653
https://doi.org/10.1016/j.jms.2009.11.011
https://doi.org/10.1016/j.jms.2009.11.011
Publikováno v:
The Journal of chemical physics. 136(15)
Electronic and vibrational structures in the S(0) (1)A(1) and S(1) (1)A(1) states of jet-cooled phenanthrene-h(10) and phenanthrene-d(10) were analyzed by high-resolution spectroscopy using a tunable nanosecond pulsed laser. The normal vibrational en
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::544f313a0381c37bdf0436e741c9b687
https://pubmed.ncbi.nlm.nih.gov/22519320
https://pubmed.ncbi.nlm.nih.gov/22519320
Autor:
Kazuto Yoshida, Motohisa Saitoh, Takaya Yamanaka, Yosuke Semba, Yasuyuki Kowaka, Sheng Hsien Lin, Shunji Kasahara, Masaaki Baba, Kunio Taguma, Yen-Chu Hsu, Yasuhiro Ohshima
Publikováno v:
The Journal of chemical physics. 131(22)
Vibrational level structure in the S(0) (1)A(g) and S(1) (1)B(3u) states of pyrene was investigated through analysis of fluorescence excitation spectra and dispersed fluorescence spectra for single vibronic level excitation in a supersonic jet and th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::583900e845c792f888becd3f5e1d886a
http://hdl.handle.net/2433/91263
http://hdl.handle.net/2433/91263
Autor:
Takayoshi Ishimoto, Takaya Yamanaka, Yasuyuki Kowaka, Katsuhiko Okuyama, Yuki Noma, Umpei Nagashima, Shunji Kasahara, Motohisa Saito, Koichi Mori, Masaaki Baba
Publikováno v:
The journal of physical chemistry. A. 113(11)
Fluorescence excitation spectra and dispersed fluorescence spectra of jet-cooled 9-methylanthracene-h12 and -d12 (9MA-h12 and 9MA-d12) have been observed, and the energy levels of methyl internal rotation (CH3 torsion) in the S0 and S1 states have be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4e28f73a592256ac3088873aec2d3144
https://pubmed.ncbi.nlm.nih.gov/19231826
https://pubmed.ncbi.nlm.nih.gov/19231826
Autor:
Takayoshi Ishimoto, Yasuyuki Kowaka, Masaaki Baba, Naofumi Nakayama, Hitoshi Goto, Umpei Nagashima
Publikováno v:
The Journal of Chemical Physics. 135:054305
Geometrical structures of the isolated benzene and naphthalene molecules have been accurately determined by using ultrahigh-resolution laser spectroscopy and ab initio calculation in a complementary manner. The benzene molecule has been identified to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c072c610cba93a0bffc2edd5888e32f9
https://doi.org/10.1063/1.3622766
https://doi.org/10.1063/1.3622766
Autor:
Masaaki Baba, Koichi Mori, Motohisa Saito, Yasuyuki Kowaka, Yuki Noma, Shunji Kasahara, Takaya Yamanaka, Katsuhiko Okuyama, Takayoshi Ishimoto, Umpei Nagashima
Publikováno v:
Journal of Physical Chemistry A; Mar2009, Vol. 113 Issue 11, p2366-2371, 6p