FrictionalForce KelvinProbeForceMicroscopy Electical&Electronics AM_KPFM Sidewall Polyvinylidene silicon_oxide Optoelectronic HOPG Polyurethane Lift ForceVolume IISCBangalore PANI SiWafer Led Polyethylene Composition BiVO4 Fe_film Bacteria Metal Tapping FrictionForce molecular_beam ItoGlass GlassTemperature Electrode SoftSample ContactMode SiliconCrystal Zhi OpticalWaveguides WWafer Heating