mechanical_property HanyangUniv SiWafer KAIST Hafnia ElectrostaticForceMicroscopy NUSNNI OxideLayer Spincast DIWafer PtfeMembrane Solution LateralForce Chemical Vapor Deposition flakes cannabis Polyvinylidene_fluoride Mfm Imprint Hysteresys NUS_NNI_Nanocore FloppyDisk Etch FrictionalForceMicroscopy WWafer SThM Yeditepe_University Layer Cell GalliumPhosphide hard_disk Protein Genetic Conduct Gong