contact Chungnam_National_University thermal_conductivity chemical_compound KelvinProbeForceMicroscopy Scratch IcelandSpar Memory MechanicalProperty PhaseImaging Oxidation HfO2 CeramicCapacitor Roughness Boundary BoronNitride Epoxy Floppy Sio2 non_contact Water LiftMode Pores fluoroaalkane Multiferroic_materials Electrical&Electronics Neodymium Zhi Worcester_Polytechnic_Institute DeoxyribonucleicAcid atomic_steps Sic OpticalElement KPFM Pyroelectric