Fig. 3
From: Nanoscale engineering of gold nanostars for enhanced photoacoustic imaging
AuNP and AuNS characteristics before and after functionalization. (a, d, g, j) Extinction spectra, (b, e, h, k) hydrodynamic diameter (HD) and polydispersity index (PDI), and (c, f, i, l) zeta potential of AuNPs and AuNS before and after functionalization with 2 kDa PEG, 6 kDa PEG, chitosan and melanin. Values represent mean ± standard deviation of three different batches of nanoconstructs