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Ikeura, Hiromi*; Sekiguchi, Tetsuhiro
Molecular Crystals and Liquid Crystals, 622(1), p.50 - 54, 2015/12
Times Cited Count：0 Percentile：0.01(Chemistry, Multidisciplinary)Organic electrically conducting 
-stacked molecules are widely regarded as promising materials for future application of nanoelectronics. Direct measurements of electronic structures of unoccupied states in organic semiconductors lead to better understanding of mechanism of electron conduction. For probing unoccupied partial density of states (DOS), X-ray absorption spectroscopy (XAS) is commonly used, where selective excitation of the 1s core electron to the unoccupied conduction band is possible. However, XAS cannot distinguish localized and delocalized features without comparing any theoretical approach. In this work, the core-hole-clock method in resonant Auger spectroscopy (RAS) has been applied to probe electron delocalization through the empty conduction band in the attosecond domain for the purpose of exploring electronic materials with high-speed electron transport. We will discuss some organic molecules such as pentacenes.
Matsuura, Hideharu*; Kagamihara, So*; Ito, Yuji*; Oshima, Takeshi; Ito, Hisayoshi
Microelectronic Engineering, 83(1), p.17 - 19, 2006/01
Times Cited Count：3 Percentile：24.42(Engineering, Electrical & Electronic)no abstracts in English
Laird, J. S.; Hirao, Toshio; Onoda, Shinobu; Ito, Hisayoshi
Journal of Applied Physics, 98(1), p.013530_1 - 013530_14, 2005/07
Times Cited Count：45 Percentile：80.53(Physics, Applied)no abstracts in English
Oi, Akihiko; Oshima, Takeshi; Yoshikawa, Masahito; Lee, K. K.; Iwami, Motohiro*; Ito, Hisayoshi
Materials Science Forum, 389-393, p.831 - 834, 2002/05
no abstracts in English
and electron irradiationOyama, Hidenori*; Hirao, Toshio; Simoen, E.*; Claeys, C.*; Onoda, Shinobu*; Takami, Yasukiyo*; Ito, Hisayoshi
Physica B; Condensed Matter, 308-310, p.1226 - 1229, 2001/12
Times Cited Count：31 Percentile：79.64(Physics, Condensed Matter)no abstracts in English
Kishimoto, Maki; Nakamura, Tatsuya; To, Kentaro; Sakasai, Kaoru; Katagiri, Masaki; Takahashi, Hiroyuki*; Nakazawa, Masaharu*
Nihon Genshiryoku Gakkai-Shi, 43(2), p.168 - 181, 2001/02
Times Cited Count：1 Percentile：11.99(Nuclear Science & Technology)no abstracts in English
Oshima, Takeshi; Ito, Hisayoshi; Yoshikawa, Masahito
Dai-11-Kai Ryushisen No Sentanteki Oyo Gijutsu Ni Kansuru Shimpojiumu (BEAMS 2000) Hobunshu, p.139 - 142, 2000/11
no abstracts in English
Onishi, Kazunori*; Takahashi, Yoshihiro*; *; Yoshikawa, Masahito
JAERI-Research 95-090, 40 Pages, 1996/01
JAERI-Research-95-090.pdf:1.41MB
no abstracts in English
-ray irradiation*; *; Takahashi, Yoshihiro*; Yoshikawa, Masahito; Onishi, Kazunori*
Heisei-5-Nendo (Dai-37-Kai) Nihon Daigaku Riko Gakubu Gakujutsu Koenkai Koen Rombunshu; Zairyo, Bussei, p.131 - 132, 1993/00
no abstracts in English
solid solutions; ; ;
Journal of Nuclear Materials, 150, p.233 - 237, 1987/00
Times Cited Count：6 Percentile：55.64(Materials Science, Multidisciplinary)no abstracts in English
Nuclear Radiation Detectors*; ;
JAERI-M 8478, 133 Pages, 1979/10
no abstracts in English
Ikeura, Hiromi*; Sekiguchi, Tetsuhiro
no journal, ,
Many peaks are observed in X-ray absorption fine structure near the inner-shall edges. Such fine structures are called near-edge X-rays absorption fine structure or abbreviated as NEXAFS. NEXAFS spectra provide us with information on property of electronic states concerning partial density of states of unoccupied conduction band for materials. In this work, we have investigated several sulfur-containing thiophene derivative polymers using NEXAFS spectroscopy. We have recorded the S K-edge NEXAFS spectra of film samples of these electronic materials and tried to interpret the origin of electronic transition seen in NEXAFS on the basis of molecular orbital theory. Furthermore, we discuss whether there is a potential relation between the observed spectra and charge-transfer property of the materials.
