PS_PVAC 2d_materials TriGlycineSulphate Wonseok plastics LFM fifber Temasek_Lab Dimethicone PVAP3HT LiIonBattery fluoroalkane tip_bias_mode SiliconOxide Mechinical NtuEee DeoxyribonucleicAcid Mechanical&nanotechnology flakes EFM Pipette Hole Bmp solar_cell frequency_modulation 2dMaterials ScanningSpreadingResistanceMicroscopy StainlessSteel ConductiveAFM ContactMode MonoLayer Mechanical cannabinoid MultiLayerCeramicCapacitor LowDensityPolyethylene