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Photothermal conversion capacity of COL hydrogel. (a) NIR region of the UV–vis–NIR spectrum recorded for chitosan/polyaniline/laponite (COL) hydrogel. (b) Temperature rise curve of COL hydrogel containing saline at different laser densities of 808 nm for 5 min. (c) Thermogram of COL hydrogel corresponding to (a). (d) Photothermal stability of COL hydrogel over 6 lasers’ on/off cycles. (e) Temperature rise and fall curves and η of COL hydrogel.
