SICM Gold Optoelectonics AIN IVSpectroscopy fluoroaalkane GaN tip_bias_mode C_AFM AnodizedAluminumOxide ForceVolume IcelandSpar Epoxy Mfm Melt hetero_structure Steps self-assembly Bacteria Regensburg Permalloy HDD 2dMaterials InorganicCompound temp_control Defect Gallium Liquid molecules high_resolution Self-assembledMonolayer Moire Mechanical Tungsten Piezo