pulsed_laser_deposition Piezoelectric PUR ring shape Vinylpyridine Typhimurium BiasMode plastics Bio non_contact ULCA hetero_structure Indium_tin_oxide Graphene Flake Chloroform molecular_beam OrganicSemiconductor TempControl Calcium cooling StrontiumTitanate organic_polymer HiVacuum Sadowski FrequencyModulation UnivCollegeLondon Deposition Spincast doped Vac Insulator neodymium_magnets Pore Sic