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. 2014 Oct 28;30(46):13737–13743. doi: 10.1021/la502955h

Figure 2.

Figure 2

Nanoparticle tracking analysis of (a) cit-GNRs in 5 mM Na3-cit (pH 7.3) and (b) PSS-GNRs in 0.4 wt % Na-PSS (pH 5), at similar particle concentrations (ca. 2 × 109 GNRs/mL). The latter shows a large number of aggregates in the 75–200 nm range, assumed to be a composite of polymer and GNRs (PSS background provided for comparison).