Sidewall sputter SingleLayer PS_PVAC molecules PinPointMode tip_bias_mode Graphene PetruPoni_Institute Stiffness Genetic Pvdf HighResolution IIT-chennai FAFailureAnlaysis Gallium_Arsenide Semiconductor small_scan PVAC Insulator Lanthanum_aluminate LiftHeight Biology PECurve Flake AdhesionEnergy membrane PatternedSapphireSubstrat mono_layer GalliumPhosphide Cross-section Water Filter Non-ContactMode Anneal