BiasMode Pvdf SPMLabs Heating Logo cannabidiol LightEmission PolyvinylideneFluoride piezoelectric force microscopy Gold Imprint InorganicCompound Scratch sputter heterojunctions TemperatureControllerAFM Praseodymium SFAs Tape Mfm GalliumPhosphide FloppyDisk OpticalElement Iron Dental Sulfur Thermal gallium_nitride Boundary Mosfet Hexylthiophene Corrosion NUSNNI epitaxy domain_switching