[23a-11F-1~11] 3.11 Nanoscale optical science and near-field optics (formerly 3.12)

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[23a-11F-3] High spatial resolution SPR imaging of PDA film thickness with a plasmonic chip

〇Yasunori Nawa¹, Keiko Tawa¹ (1.Kwansei Gakuin Univ.)

Keywords:

High spatial resolution,Grating-coupled surface plasmon,SPR imaging

Surface plasmon resonance (SPR) method is label-free, real-time, and quantitative measurement technique to evaluate molecular adsorption and desorption. We develop a high spatial resolution SPR imaging technique using an objective lens with a high numerical aperture because the reflection spectrum in the focal region is measured. In this study, thin polydopamine films were measured and thickness changes less than 2 nm were sensitively detected in a small area.