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. Author manuscript; available in PMC: 2017 Jul 19.
Published in final edited form as: Anal Chem. 2016 Jul 8;88(14):7191–7197. doi: 10.1021/acs.analchem.6b01378

Figure 2.

Figure 2

SERS spectra of 3-HTP, 3-MPBA and 3-MPBA treated with 100 μM H2O2. All of the Au colloids samples were aggregated by 1 M NaBr solution before measurement. (λex = 785 nm, Plaser = 500 μW, t = 10 s). The SERS spectra (blue trace) of the H2O2 treated nanoprobe exhibits different spectra from the untreated samples (3-MPBA, green trace) and is almost identical to the spectra of the oxidized product (3-HTP, red trace).