Fig. 2: Characterization of Au@PSa nanocomposites.

a, b TEM images of different Au@PSa nanocomposites; c, e UV–Vis spectra of the Au NRs and Au@PSa nanocomposites; and d, f temperature variations of water and Au@PSa solutions (200 μg/mL) upon irradiation at 808 nm (2 W/cm2)