Figure 7.

SERS spectra of arsenate at the different concentrations using Ag/GL-5/2.5-18 as an active substrate: (a) 0, (b) 5, (c) 25, (d) 75, and (e) 150 μg·L-1. The spectra were shifted vertically for clarity but the relative intensity was kept unchanged.

Hao et al. Nanoscale Research Letters 2011 6:263   doi:10.1186/1556-276X-6-263
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