suspended_graphene HighAcpectRatio ScanningTunnelingMicroscopy NCM\ Writing LiftHeight CNT Regensburg SSRM Mfm ContactModeDots gallium_nitride Pinpoint PFM Piezoresponse plastics Al2O3 Global_Comm lithography Yttria_stabilized_Zirconia Hexatriacontane layers Molybdenum_disulfide Trench LightEmission Lanthanum_aluminate C_AFM PinpointNanomechanicalMode Transparent MoS2 Adhesive UnivMaryland Steps molecules ForceVolumeMapping Boundary