LithiumNiobate ring shape CarbonNanotube DNAProtein Plug Foil Piezoelectric Friction Step Electical&Electronics Calcium KAIST BTO SiliconCrystal CNT Pyroelectric Tungsten_disulfide StrontiumTitanate WPlug PolymerBlend WWafer Polyvinylidene Global_Comm TCS SurfaceChange FrictionalForce IndiumTinOxide Fujian Current #Materials NeodymiumMagnets AdhesionEnergy Collagen Solution molecular_beam