Cross-section HACrystal YszSubstrate FrictionalForce CP-AFM conductive GaN ThermalProperties Trench CopperFoil atomic_layer Resistance HBN Fiber thermoplastic_elastomers Metal LateralForceMicroscopy DLaTGS Christmas Wildtype Subhajjit Piezo ScratchMode SingleLayer Gallium_Arsenide PtfeMembrane PhaseImaging electrospinning AdhesionEnergy BiasMode SFAs SiliconeOxide MBE LightEmission LiIonBattery