나노라미네이션을 통한 고성능 표면 증강 라만 분광(SERS) 기판 설계

Abstract

In this study, we present three-dimensional (3D) nanolaminate surface-enhanced Raman spectroscopy (SERS) substrates that can achieve high sensitivity. Based on vertically stacked metal-insulator-metal structures, the selective etching of the insulating layers allows target analytes to directlyaccess plasmonic hotspots. We investigate the far-field and near-field optical characteristics of nanolaminate SERS substrates and successfully detectlow concentrations of chlorpyrifos molecules, suggesting the potential for diverse SERS applications. This study introduces a novel design that cansignificantly enhance SERS performance, and is expected to provide a critical foundation for the development of next-generation high-performanceSERS sensors.