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. Author manuscript; available in PMC: 2014 Jun 25.
Published in final edited form as: ACS Nano. 2013 May 22;7(6):5568–5576. doi: 10.1021/nn401837q

Figure 1.

Figure 1

(A) Bright field and fluorescence images of solutions containing citrate-AuNPs, free RBITC, Ab2-RBITC-AuNPs, and Ab2-RBITC-AuNPs treated with 1 mM of cysteamine. The absorption spectra (B) and fluorescence emission spectra (C) of solutions containing citrate-AuNPs, free RBITC, Ab2-RBITC-AuNPs, and Ab2-RBITC-AuNPs treated with 1 mM of cysteamine. (D) Fluorescence emission spectra of Ab2-RBITC-AuNPs solutions treated with various concentrations of cysteamine ranging from 0 to 1 mM. The spectra were collected 1 min after the addition of cysteamine.