Mechanical MolecularSelfAssembly LogAmplifier WWafer ULCA GalliumPhosphide cooling Hexatriacontane Adhesion Vac PatternedSapphireSubstrat ContactMode Wang Gong Step CVD Grain GaN Plug silicon_oxide Piezoresponse NTU 2d_materials Laser LaAlO3 ScratchMode STO VinylAlcohol OxideLayer SoftSample atomic_layer NCM PolycrystallineFerroelectricBCZT ScanningKelvinProbeMicroscopy ForceVolumeImage