PtfeFilter SSRM EFM mechanical property AtomicSteps ForceVolumeImage organic_polymer Photovoltaics MESA structure Nickel blended polymers UnivMaryland Croatia Pzt mfm_amplitude MeltingPoint ScanningThermalMicroscopy Polyvinylidene PANI DataStorage Self-assembledMonolayer optoelectronics Sidewall Tapping IIT-chennai mechanical_property LogAmplifier HBN BiVO4 Insulator Crystal NanoLithography CarbonNanotube lithography AEAPDES