Copper chalcogenide-based nanostructures as photothermal materials. (a) TEM image of porous Cu12Sb4S13 tetrahedron architectures. (b) The corresponding absorption spectra with different concentrations. The inset shows the Beer's law plot at 808 nm. (c) The corresponding temperature measurements with different concentrations under 808 nm laser irradiation. Reproduced from ref. 73 with permission from the Royal Society of Chemistry. (d) TEM image of Cu9S5 nanoplates. Reproduced from ref. 76 with permission from American Chemical Society, Copyright 2011. (e) TEM image of Cu7.2S4 nanocrystals. Reproduced from ref. 77 with permission from the Royal Society of Chemistry.