[21a-231C-1~11] 12.2 Characterization and Materials Physics

[21a-231C-1] Observation of structural change in single C₆₀ molecular junction

〇Satoshi Kaneko¹, Kazuhito Tsukagoshi², Manabu Kiguchi¹ (1.Tokyo Tech., 2.NIMS)

Keywords:single molcular junction, Surface enhanced Raman scattering, Fullerene

In this research, we aimed to observe the behavior of the single C₆₀ molecule in the single molecular junction. We fabricate the gold electrode utilizing electron beam lithography and lift-off process. Modified mechanically controllable break junction technique enabled to fabricate the C₆₀ single molecular junction. We measured the surface enhanced Raman scattering (SERS) spectra and current-voltage (I-V) response of the single molecular junction. I-V response combined with SERS has revealed C₆₀ molecular junction has two bridging structure which is identified by the difference in the electric coupling between C₆₀ and gold. Using simultaneous measurement of I-V and SERS, we observed the transition of the two conductance states at room temperature.