Subhajjit GaN PVAC OrganicCompound polymeric_arrays temp_control Silver Nanostructure HexagonalBN GlassTemperature Reading GaP Kevlar Wonseok CalciumHydroxide Boundary TransitionMetal Cell FrictionalForceMicroscopy Fluoride Edwin Gong MechanicalProperties ScanningKelvinProbeMicroscopy KevlarFiber SrTiO3 SingleCrystal tip_bias_mode TyphimuriumBiofilm Materials Calcium #Materials SKPM Conductance Mfm