Fig. 3
From: SERS discrimination of single DNA bases in single oligonucleotides by electro-plasmonic trapping
Reproducible SERS spectra of a trapped adenine-multilayer-adsorbed gold nanourchin (A–AuNU) by controllable trapping through turning on and off the bias. a Time trace of intensity of the Raman peak at 730 cm–1 (red line) of a single A–AuNU trapped in a nanopore by incident laser of 6-mW power and applied bias of 1 V (blue line). b Corresponding time series of the stable SERS spectra produced by the trapped A–AuNU. The color bar represents the intensity.
