Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Comparison of Raman signal from R6G on original butterfly wing, Ag/wing and hollow Ag-Au/wing, R6G concentration: 10−3 mol/L; (b) Comparison of Raman signals from different concentrations of R6G on hollow Ag-Au/wing, R6G concentrations: 10−4 mol/L, 10−5 mol/L, 10−6 mol/L.
