IcelandSpar Polydimethylsiloxane membrane Vortex thermal_property VortexCore self-assembly GaP Ni-FeAlloy Nickel Self-assembledMonolayer TiO2 PhaseImaging SoftSample Electrode small_scan sputter InorganicCompound Switching ChemicalCompound Heating PetruPoni HBN NUSNNI Galfenol Polyethylene Sio2 Kevlar LiftHeight Annealing STO Chemical_Vapor_Deposition ScanningKelvinProbeMicroscopy piezoelectric force microscopy HDD