NUS Step HBN atomic_layer P3HT Collagen SurfaceOxidation MagneticArray PtfeMembrane electrospinning MfmAmplitude ItoGlass Sic Chromium strontiu_titanate BiasMode Bmp China Wafer Cancer InorganicCompound SingleCrystal PinpointNanomechanicalMode PFM Polyurethane SICM Gold Pinpoint PFM Lateral AEAPDES VortexCore Edwin Mfm Phase AdhesionForce