Polytetrafluoroethylene China Hair Ucl Optoelectonics plastics SurfaceChange TipBiasMode IIT-chennai CuFoil self-assembly SetpointMode LiftHeight VortexCore FailureAnlaysis WS2 Cross-section PetruPoni_Institute flakes Indent Pattern Growth Biofilm LMF Self-assembledMonolayer PvdfBead ThermalConductivity Resistance DIWafer PolyStylene MechanicalProperty CeNSE_IISc HighAcpectRatio CNT HumanHair