Skip to main content
. Author manuscript; available in PMC: 2017 Feb 6.
Published in final edited form as: Bioconjug Chem. 2015 Jul 2;26(8):1470–1474. doi: 10.1021/acs.bioconjchem.5b00343

Figure 1.

Figure 1

Synthesis and characterization of AuNS. (a) Transmission electron microscopy (TEM) images of AuNP and AuNS. Spherical particles (diameter 13 nm, left) were used as a seed to grow AuNS (right). (b) The size of AuNS was controlled by changing the ratio between AuNP seed and Au3+ precursor concentrations. (c, d) Absorbance spectra of AuNS. Increasing the particle size led to shifts of the LSPR peaks to longer wavelengths. (e) Bare AuNS showed a drift in LSPR peak over time. Passivating the AuNS with a thiol ligand (11-mercaptoundecanoic acid/MUA) stabilized the LSPR spectra.