EPFL PUR Piranha organic_polymer Tin disulfide Anneal Mechanical&nanotechnology Laser Piezoresponse StyreneBeads Friction Boron Pore Imprint amplitude_modulation China Barium_titanate conductive high_resolution Cobalt F14H20 Reduction OpticalModulator Etch mechanical_property 3-hexylthiophene Boundary PetruPoni_Institute graphene_hybrid Alkane Perovskite temp Chromium Tungsten Neodymium