Table 1.
Citratea | HS-PEG2000 | HS-PEG5000 | HS-PEG10000 | HS-PEG20000 | |
---|---|---|---|---|---|
rhyd (nm)b | 16(1) | 23(1) | 54 | 74 | 93 |
ζ (mv) | −32(2) | −13(1) | −5(1) | −8(1) | −1(1) |
%w/wc | 10.69(5) | 21.95(6) | 21.72(3) | 29.41(7) | |
n/NPd | 1805 | 1758 | 890 | 651 |
a Parent AuNP, with no PEG coating b hydrodynamic radius determined in water. c % of PEG weight in dry samples; water is adsorbed on the solid samples used for TGA measurements, the % Au is calculated by subtracting the % of PEG and % of water to 100 (see SI for TGA profiles and details); d number of polymer chains per NP.