title: Tip-enhanced Raman spectroscopic measurement of stress change in the local domain of epitaxial graphene on the carbon face of 4H-SiC(000-1).
abstract: We develop a bulk silver tip for tip-enhanced Raman scattering (TERS) and obtain TERS spectra of epitaxial graphene on the carbon face of 4H-SiC(000-1) with a high signal-to-noise ratio. Thanks to the high quality of TERS spectra we firstly find that the G band in the TERS spectra exhibits position-by-position variations in both lower wavenumber shifts and spectral broadening. The analysis of the variations reveals that the shifts and broadenings have a linear correlation between each other, indicating that the variations are induced by the position dependent local stress on graphene based on a uniaxial strain model.
authors.affiliation: Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan. ozaki@kwansei.ac.jp.
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Suzuki
authors.forename: Tamitake
authors.initials: T
authors.lastname: Itoh
authors.forename: Sanpon
authors.initials: S
authors.lastname: Vantasin
authors.forename: Satoshi
authors.initials: S
authors.lastname: Minami
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Kutsuma
authors.forename: Koji
authors.initials: K
authors.lastname: Ashida
authors.forename: Tada-aki
authors.initials: TA
authors.lastname: Kaneko
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Morisawa
authors.forename: Takeshi
authors.initials: T
authors.lastname: Miura
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Ozaki
mesh_terms: D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D059629:Signal-To-Noise Ratio; D017655:Silicon Compounds / Q000737:chemistry*; D012834:Silver / Q000737:chemistry; D013059:Spectrum Analysis, Raman
chemical_list: D017554:Carbon Compounds, Inorganic; D017655:Silicon Compounds; D012834:Silver; D006108:Graphite; C022088:silicon carbide