Graphene Co/Cr/Pt Laser PVAC Titanate KelvinProbeForceMicroscopy piezoelectric force microscopy Indium_tin_oxide CalciumHydroxyapatite PinpointPFM PolyvinylAcetate #EC Styrene YszSubstrate LFM Topography PUR PolyStylene Indent Cell EPFL Silver Temasek_Lab Chloroform Sapphire Lateral_Force_Microscopy Bacterium fluoroaalkane Solution PolymerPatterns Varistor Flake ForceVolume ShenYang P3HT