MonoLayer Aluminum Gallium Chloroform SFAs cross section VortexCore polyvinyl acetate Typhimurium Aluminium_Oxide Dopped Chrome Bio MembraneFilter Electronics ring shape HighAcpectRatio Gong ChemicalCompound molecule Ceramics temperature controller AFM Hexatriacontane Jason PS_LDPE Piezoelectric Heat Polyaniline ULCA Hole Mechanical NusEce tip_bias_mode NUS_Physics University_of_Regensburg