layers HighAspect TPU Composite SicMosfet LiBattery NUS PDMS alkanes CarbonNanotube tip_bias_mode LFM non_contact BiasMode suspended_graphene MBE FAPbI3 MfmPhase #EC Yttria_stabilized_Zirconia Friction CastIron YszSubstrate ScanningKelvinProbeMicroscopy CntFilm self-assembly Composition PinpointNanomechanicalMode ChemicalCompound PvdfBead OpticalWaveguide ScratchMode Aluminum TipBiasMode biocompatible