vertical_PFM CancerCell SKKU SRAM LightEmission PVA heterojunctions LiquidCell Worcester_Polytechnic_Institute Nanofiber Vortex Resistance Dental Pzt cooling Vac gallium_nitride amplitude_modulation IRDetector Friction Magnetostrictive Ceramics University_of_Regensburg Lateral Au111 Phthalocyanine lift_mode Growth multi_layer block_copolymer PFM Fluoride FrictionalForceMicroscopy Chromium Lattice