Sphere InsulatorFilm UnivCollegeLondon MechanicalProperty Holes HydroGel small_scan rubber STO thermoplastic_elastomers Piezoresponse CVD Wildtype Electical&Electronics Dopped Ni81Fe19 Bmp ScanningKelvinProbeMicroscopy SKPM temperature controller AFM Conduct gallium_nitride lift_mode Titanate norganic PatternedSapphireSubstrat Oxidation Steps Mechinical Optoelectronic AtomicSteps Chungnam_National_University CuParticle Treatment Boron