所属：Department of Precision Science and Technology, Graduate School of Engineering, Osaka University

概要：This study demonstrates a tip-enhanced Raman spectroscopy (TERS)-induced chemical reaction by immobilizing molecules with a self-assembled monolayer on a Au(111) surface. The Raman spectrum of an isolated molecule and their derivatives were calculated to compare with the TERS spectrum. The intensities of the Raman spectra were converted from the calculated Raman activities using an equation which is available in the Chemcraft software. Raman spectra of an isolated pristine [7]TH-aldehyde molecule, and of the isolated [7]TH-aldehyde molecule with the L-mode localized at the side (L1), center (L2) and on all three benzene rings (L3) were calculated and compared to the experimental results. According to the calculated spectra, the L1- and L2-modes result in peaks at 1996 and 2012 cm-1, respectively. By the comparison to the experimental results, it is deduced that one side benzene ring which protruded upwards close to the tip had undergone hydrogenation induced by pyrolysis with the tip acting as both local heat source and catalyst.

論文掲載,発表実績:
（学術雑誌掲載論文）

• S. Chaunchaiyakul, A. Setiadi; P. Krukowski, F. C. Catalan, M. Akai-Kasaya, A. Saito; N. Hayazawa, Y. Kim, H. Osuga, Y. Kuwahara, “Nanoscale Dehydrogenation Observed by Tip-Enhanced Raman Spectroscopy”, The Journal of Physical Chemistry C, 121, 18162 (2017).
• Y. Kuwahara, S. Chaunchiayakul, A. Setiadi, P. Krukowski, H. OsugaChemical Analysis of Nanomaterials Studied by Tip-enhanced Raman Scattering Spectroscopy, Collaborative Conference on Materials Research (CCMR) 2017 28, Jul (2017), International Convention Center (ICC) Jeju

（国際会議会議録掲載論文）

• Y. Kuwahara, S. Chaunchiayakul, A. Setiadi, P. Krukowski, H. OsugaChemical Analysis of Nanomaterials Studied by Tip-enhanced Raman Scattering Spectroscopy, Collaborative Conference on Materials Research (CCMR) 2017 28, Jul (2017), International Convention Center (ICC) Jeju

（国内研究会等発表論文）

• 桑原裕司、P. Krukowski、S. Chaunchayakul、赤井恵、斎藤彰, 発光探針増強ラマン分光法による局所構造・局所化学反応分析, 第2回マルチスケールサイエンス研究会, 2017年5月6日、 弘前大学