Additional file 1: Figures S1 to S3.
Figure S1. X-ray photoelectron spectroscopy (XPS) high-resolution spectra of C (1s) and S (2p) for MUA (a and b). Figure S2. (a) UV-visible-IR extinction spectra of representative GNR-MUA added with NaCl. (b) The dependence of the LSPR shift upon the concentration of NaCl. Figure S3. Reversibility of LSPR shift from unwashed GNR-MUA between pH 6.31 and 10.65.
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Toh et al. Nanoscale Research Letters 2013 8:103 doi:10.1186/1556-276X-8-103