nanomechanical Mobile Trench silicon_oxide Electical&Electronics China PVA Melt Implant Genetic Edwin self-assembled_monolayer Ptfe Sidewall FrictionalForce Chungnam_National_University ConductiveAFM polyvinyl acetate Polyethylene GaP ScanningSpreadingResistanceMicroscopy ReflexLens thermal_conductivity TempControl BreastCancerCell semifluorinated_alkane PVAP3HT DLaTGS PinPointMode ShenYang Switching PiezoelectricForceMicroscopy ThermalProperties Deposition GalliumPhosphide