PDMS CntFilm PtfeFilter lithography Techcomp CuParticle ULCA Perovskite Flake high_resolution PANI OpticalWaveguides ring shape Blend SAM Gong Wonseok StainlessSteel Edwin EFM PhthalocyaninePraseodymium Magnetic Force Microscopy block_copolymer ThermalDetectors Molybdenum Reduction Insulator Sio2 Vinylpyridine OpticalElement OpticalModulator BariumTitanate norganic single_layer Ananth