[18a-E308-1~9] 17.2 Graphene

[18a-E308-4] Improved surface-enhanced Raman spectroscopy (SERS) sensitivity by graphene

〇Kanako Shiga¹, Kensuke Imai¹, Mitsuki Kusano¹, Hirokazu Fukidome², Akira Satou², Taiichi Otsuji², Takashi Uchino¹ (1.Tohtech, 2.Tohoku Univ. RIEC)

Keywords:graphene, SERS, transfer

Surface-enhanced Raman spectroscopy (SERS) is a promising analytical technique, which can detect single molecules using localized surface plasmon resonance (LSPR) and has attracted attention because of label-free detection with a high degree of specificity. Gold and silver nanoparticles have been traditionally used for SERS substrates. Besides, two-dimensional (2D) materials such as graphene and h-BN have been explored recently as a new platform for SERS. In this study, we investigated SERS effect by surface plasmon polaritons (SPP) using single-crystal Ag thin films with nanovoids. Next, we investigated hybrid SERS substrates where single-layer graphene films coated on the single-crystal Ag thin films to improve SERS sensitivity.