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. Author manuscript; available in PMC: 2014 Jun 7.
Published in final edited form as: Analyst. 2013 Jun 7;138(11):3150–3157. doi: 10.1039/c3an36898j

Figure 4.

Figure 4

The UV-visible extinction spectra measured from serial addition of streptavidin (SA) solution to the biotinylated-GNP solution show a peak shift associated with nanoparticle aggregation. The vertical lines indicate the peak positions in the extinction spectra.