doped rubber self-assembly Calcium Photovoltaics Electrode ScanningIon-ConductanceMicroscopy Scratch silicon_oxide Vinylpyridine optoelectronics BlockCopolymer TPU DataStorage SPMLabs Roughness Copper H-BN LaAlO3 Laser Optic CrAu India PinpointNanomechanicalMode domain_switching C_AFM TappingMode HydroGel BCZT #EC IVSpectroscopy Magnetic Force Microscopy AtomicSteps Pyroelectric sputter