Extended Data Fig. 10: Silk surfactant-assisted universal wetting over various substrates.
From: Silk fibroin as a surfactant for water-based nanofabrication

a, Digital image of PbNO3 and MAPbI3 film created by coating a PDMS surface with an SF-added PbNO3 solution, and followed by MAI treatment for MAPbI3. b, Digital images of the bended or stretched MAPbI3/PDMS block. c, Digital image of ZrO2 film formed by coating a Zn foil with an SF-added ZrOCl2 solution.