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. Author manuscript; available in PMC: 2012 Mar 14.
Published in final edited form as: Anal Bioanal Chem. 2005 Oct 29;383(5):763–767. doi: 10.1007/s00216-005-0097-3

Fig. 1.

Fig. 1

Representative UV-vis absorption spectrum of 3×10−11 M silver nanoparticles. The weak absorption towards the 780 nm region is believed to be sufficient for SERS to occur. However, the absorption at 780 nm may be stronger for the dried film due to aggregation of nanoparticles used for the SERS experiment