self-assembly Jason StrontiuTitanate Lattice Celebration Reduction organic_polymer membrane PolyStylene Permalloy single_layer Sidewall optoelectronics MagneticForceMicroscopy IcelandSpar tip_bias_mode Floppy #Materials Cross-section ContactModeDots Temasek_Lab Bio Polyvinylidene_fluoride Layer Copolymer Forevision Chromium SiliconeOxide Litho oxide_layer Array Holes Bacterium fluorocarbon Fet