FrictionForce doped LiquidCell Vac BlockCopolymer SKPM CBD AEAPDES Ecoli C_AFM Array TungstenDeposition heterojunctions #EC NusEce SurfaceOxidation Mechanical Change HardDiskMedia margarine Holes Phenanthrene membrane Friction frequency_modulation DLaTGS NCM NUS_NNI_Nanocore Titanate Graphite SurfaceChange Memory China Nanostructure DataStorage