Fig. 4: NIR-II photothermal performance of PEGylated MSbNSs-3.
From: Degradable mesoporous semimetal antimony nanospheres for near-infrared II multimodal theranostics
a Vis-NIR spectra of MSbNSs-3 before (blue line) and after (red line) PEG modification. b Photothermal images and c temperature change curves of the PEGylated MSbNSs-3 with different concentrations under 1210 nm laser irradiation for about 8 min. d Temperature curves of the PEGylated MSbNSs-3 under 1210 nm laser irradiation at different power densities for about 8 min. e The photothermal heating curve of the PEGylated MSbNSs-3 under laser irradiation (1210 nm, 1 W cm−2) and cooling curve after turning off the laser. The inset shows the linear relationship between –lnθ and time obtained from the cooling. Experiments above were performed three times with similar results. f Photoacoustic amplitudes at 1210 nm as a function of concentrations of the PEGylated MSbNSs-3. Data are expressed as means ± SD (n = 3).
