REMOTE-EXCITATION TIP-ENHANCED RAMAN SPECTROSCOPY (TERS) PROBE FOR NANOSCALE TERS IMAGING

摘要

A method is disclosed for spatial resolution tip-enhanced Raman spectroscopy (TERS) imaging. The method includes physically separating a light excitation region from a Raman signal generation region on a remote-excitation tip-enhanced Raman spectroscopy (RE-TERS) probe. Also disclosed is a method of fabricating a remote-excitation tip-enhanced Raman spectroscopy (TERS) probe, and s system for spatial resolution tip-enhanced Raman spectroscopy (TERS) imaging. The system includes an atomic force microscopy-tip-enhanced Raman spectroscopy (AFM-TERS) system, the AFM-TERS system having a RE-TERS probe having a conical tip, the conical tip tapering to a silver nanowire tip (AgNW tip), a silver nanocrystal (AgNC) attached to a side wall of a nanowire (NW) at an incident angle, a laser, the laser configured to propagate excited surface plasmon polaritons (SPPs) along the nanowire (NW), the nanowire (NW) configured to generate compressed excited surface plasmon polaritons (SPPs), and wherein the conical tip of the nanowire (NW) is configured to generate a nano-sized hot spot at a tip apex for TERS excitation, and an object lens configured to collect a TERS signal scattered by the silver nanowire tip (AgNW tip).