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. Author manuscript; available in PMC: 2013 Jan 24.
Published in final edited form as: ACS Nano. 2011 Dec 19;6(1):512–522. doi: 10.1021/nn2038516

Table 2.

The coverage densities of –S-PEG-NH2 chains on various types of Au nanostructures.a

Gold
nanostructures		 Coverage density of
PEG-NH2 chainsb 		Coverage density of
active -NH2 groupsc
PVP-capped AuNCsd 0.61 0.19
CTAC-capped AuNPs 0.41 0.22
citrate-capped AuNPs 1.63 1.01
CTAB-capped AuNRs 0.052 0.029
a

The coverage density is defined as the number of PEG-NH2 chains per nm2 of Au surface

b

Measured by the fluorescamine-based assay

c

Measured by the FITC-labeling assay

d

The inner surface and pores of the AuNCs were not included