Biomimetic synthesis of 2D ultra-small copper sulfide nanoflakes based on reconfiguration of the keratin secondary structure for cancer theranostics in the NIR-II region

The keratin α-helix-to-random coil transition mechanism was explored for designing the synthesis of CuS nanoflakes with great biodegradability and biocompatibility for photoacoustic imaging and photothermal in the NIR-II window.