membrane Aluminium_Oxide gallium_nitride ThinFilm PS_PVAC layers Battery self-assembled_monolayer CeNSE_IISc pinpoint mode Gong molecules LateralForce PtfeMembrane FrictionalForce Ananth organic_polymer conductive CuSubstrate HBN Butterfly Copper Vinylpyridine Fujian StyreneBeads SoftSample Calcium Praseodymium DentalProsthesis SiWafer SrO Temperature Boundary University_of_Regensburg Phenanthrene