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. Author manuscript; available in PMC: 2016 Jul 27.
Published in final edited form as: Langmuir. 2015 Oct 30;31(45):12339–12347. doi: 10.1021/acs.langmuir.5b02902

Figure 3.

Figure 3

LGNRs are robustly stable in biological serum. (a) LGNRs-mPEG and LGNRs-PSS were prepared, incubated with fetal bovine serum (FBS) for 3 h, and subjected to three rounds of washing by centrifugation. (b) The normalized absorbance spectrum of each GNR type was taken after each wash to assess serum stability. Measurements of absorbance peak FWHM0/FWHMn demonstrate that LGNRs-PSS are more stable in biological serum than LGNRs-mPEG. (c) Raw absorbance spectra for each particle type demonstrate this difference in stability more clearly, as LGNRs-mPEG exhibit virtually no plasmonic peak after the third wash. Unlike LGNRs-mPEG, LGNRs-PSS exhibit little change in absorbance properties.