Polystyrene kelvin probe force microscopy P3HT Photovoltaics AtomicLayer NUS_Physics GaN Conductive AFM NeodymiumMagnets Hexylthiophene CBD biocompatible Carbon University_of_Regensburg PinpointNanomechanicalMode Annealing Mechanical&nanotechnology CeNSE_IISc OpticalWaveguide Gallium MolecularSelfAssembly BlockCopolymer PiezoelectricForceMicroscopy Indium_tin_oxide HighResolution BiasMode blended polymers Vacuum SiliconeOxide ContactMode Metal LogAmplifier Magnetostrictive MembraneFilter Scanning_Thermal_Microscopy