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Proceedings Paper

FUV-DUV spectra of graphene, carbon nanotubes, and polymer nanocomposites (Conference Presentation)
Author(s): Kenta Kobashi; Yusuke Morisawa; Krzysztof Bec; Ichiro Tanabe; Masahiro Ehara; Harumi Sato; Yukihiro Ozaki

Paper Abstract

The far-ultraviolet (FUV) region, which is the region of 120-300 nm, provides unique information about the electronic transitions and structure of a molecule. We have recently succeeded in measuring electronic spectra of graphene, carbon nanotubes, and polymer nanocomposites down to 150 nm using a newly developed attenuated total reflection (ATR)-UV spectrometer. The spectra of graphene show a thickness dependence. A thin graphene sample with the thickness of 1-2 nm shows a small peak near 155 nm. Single-wall carbon nanotubes with the thickness of 1-2 nm yields a similar peak. We investigate band assignments for these peaks including theoretical calculation. In the case of polymer nanocomposites a polymer gives rise to major peaks below 200 nm while nano carbon part does not show a peak in the whole region because the content of nanocarbon is very small compared with the polymer. We compared an FUV-DUV spectrum of PHB (poly(hydroxybutyrate))-graphene nanocomposites with that of PHB. A peak near 171 nm shows a longer wavelength shift by ca. 2 nm upon the formation of nanocomposites, indicating a change in electronic structure in the polymer. We investigate the cause of the shift by using quantum chemical calculations.

Paper Details

Date Published: 29 September 2017
Proc. SPIE 10351, UV and Higher Energy Photonics: From Materials to Applications 2017, 1035108 (29 September 2017); doi: 10.1117/12.2273496
Show Author Affiliations
Kenta Kobashi, Kwansei Gakuin Univ. (Japan)
Yusuke Morisawa, Kindai Univ. (Japan)
Krzysztof Bec, Kwansei Gakuin Univ. (Japan)
Ichiro Tanabe, Osaka Univ. (Japan)
Masahiro Ehara, Institute for Molecular Science (Japan)
Element Strategy Initiative for Catalysts and Batteries, Kyoto Univ. (Japan)
Harumi Sato, Kobe Univ. (Japan)
Yukihiro Ozaki, Kwansei Gakuin Univ. (Japan)

Published in SPIE Proceedings Vol. 10351:
UV and Higher Energy Photonics: From Materials to Applications 2017
Gilles Lérondel; Satoshi Kawata; Yong-Hoon Cho, Editor(s)

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