Treatment EPFL Pores Pvdf Array HanyangUniv Hydroxyapatite Roughness Biofilm atomic_steps DeoxyribonucleicAcid CalciumHydroxide IISCBangalore HighResolution layers membrane FrictionalForceMicroscopy dichalcogenide Yttria_stabilized_Zirconia SelfAssembly contact SiliconOxide hard_disk SingleCrystal PinpointNanomechanicalMode Bmp Polyimide Au111 Copper Polyethylene 3-hexylthiophene dielectric trench Ecoli Mechanical&nanotechnology TPU