Supplement Number 1

Supporting Information: Experimental section, Figs. S1-S11 include static water contact angle and oil contact angle of pristine PTFE surfaces, SEM images of pristine PTFE surface, SEM images of various positions of the LT-PTFE surface, cross-sectional profiles of the LT-PTFE, elemental chemical composition and maps of pristine PTFE surface and LT-PTFE surface, WCAs and OCAs of various positions for the LT-PTFE surface, water droplet and oil droplet sliding on the LT-PTFE surface, optical image for dynamic process of floating oil spreading, optical image of dewetting and oil diffusion dynamic process, theoretical model of dynamic process and schematic diagram of force analysis in dynamic process of dewetting and oil diffusion.