ElectroChemical ring shape FrictionalForceMicroscopy PetruPoni_Institute suspended_graphene dielectric_trench Laser optoelectronics temperature_control alkanes ScanningTunnelingMicroscopy fluoroalkane Phase Barium_titanate Dental SSRM Conductance TPU Anneal Tungsten_disulfide FastScan membrane FailureAnlaysis Cobalt Bacteria STO Oxide Materials Fujian NUS mono_layer Platinum Worcester_Polytechnic_Institute Dimethicone CrAu