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Tip-enhanced Raman spectroscopy of nanostructures on epitaxial graphene and graphene microisland
Author(s): Sanpon Vantasin; Toshiaki Suzuki; Yoshito Tanaka; Yasutaka Kitahama; Shohei Uemura; Doujima Daichi; Tadaaki Kaneko; Yukihiro Ozaki
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Paper Abstract

Despite often illustrated as a perfect two-dimensional sheet, real graphene sample is not always flat. Nanostructures can be occurred on graphene sheet, especially for epitaxial graphene. The nanostructures alter the electrical and mechanical properties of graphene. This is crucial for epitaxial graphene since its main potential is in the electronics and optics application. This study investigates nanostructures on epitaxial graphene by tip-enhanced Raman spectroscopy, which is a technique that can provide Raman spectra with great spatial resolution, exceeding the diffraction limit of light. The results suggest that the compressive strain on nanoridges is weaker compared to neighbor flat area, supporting the ‘ridge as compressive strain relaxation’ mechanism. TERS measurement of nanoridges on epitaxial graphene microisland also indicates that the ‘Si vapor trapping’ mechanism for ridge formation is unlikely to occur.

Paper Details

Date Published: 15 September 2016
PDF: 9 pages
Proc. SPIE 9925, Nanoimaging and Nanospectroscopy IV, 99250Q (15 September 2016); doi: 10.1117/12.2237536
Show Author Affiliations
Sanpon Vantasin, Kwansei Gakuin Univ. (Japan)
Toshiaki Suzuki, Kwansei Gakuin Univ. (Japan)
Yoshito Tanaka, Kwansei Gakuin Univ. (Japan)
Yasutaka Kitahama, Kwansei Gakuin Univ. (Japan)
Shohei Uemura, Kwansei Gakuin Univ. (Japan)
Doujima Daichi, Kwansei Gakuin Univ. (Japan)
Tadaaki Kaneko, Kwansei Gakuin Univ. (Japan)
Yukihiro Ozaki, Kwansei Gakuin Univ. (Japan)


Published in SPIE Proceedings Vol. 9925:
Nanoimaging and Nanospectroscopy IV
Prabhat Verma; Alexander Egner, Editor(s)

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