Figure 1:
Contrast agent spectra for USPA imaging (a) Absorption spectra of gold nanorods (AuNRs) and blood measured using UV-VIS spectroscopy and reported in literature, respectively17. Spectra include Si-AuNRs with peak absorption wavelengths of 780 nm and 850 nm and endogenous contrast, oxygenated and deoxygenated blood. (b) Spectra key and TEM images of Si-AuNRs obtained from Nanohybrids, Inc.