SKKU exfoliate Heat ConductiveAFM Plug NUS_NNI_Nanocore Chungnam_National_University thermal_conductivity Boundary GalliumPhosphide Hafnia SKPM Polyurethane layers C60H122 Co/Cr/Pt Boron Dopped TransitionMetal HfO2 Nanotechnology KelvinProbeForceMicroscopy Titanate CVD ForceDistanceSpectroscopy Kevlar bias_mode IMT_Bucharest TungstenDeposition FrequencyModulation Polyvinylidene PetruPoni_Institute aluminum_nitride Pores vertical_PFM