Spain nanobar PolyvinylAcetate TriGlycineSulphate MagneticForce hard_disk_media small_scan hard_disk Composition Conductive AFM NtuEee SoftSample Litho high_resolution Defects Silver plastics ShenYang Pvdf DLaTGS MonoLayer Nanostructure Switching WPlug fluoroalkane AAO EPFL Topography plastic KelvinProbeForceMicroscopy non_contact Polytetrafluoroethylene ForceMapping GlassTemperature Ferroelectric