Bio StyreneBeads Worcester_Polytechnic_Institute molecular_self_assembly Sapphire molecular_beam Conductance Forevision PUR Hydroxyapatite HiVacuum plastics 2-vinylpyridine Piranha Oxidation food SKPM LiquidImaging molecules Vanadate Strontium optoelectronics mfm_amplitude ContactMode FM_SKPM SingleCrystal Mosfet AIN Gallium MembraneFilter Tin sulfide single_layer dielectric_trench TiO2 LiquidCrystal