ring shape TransitionMetal Polymer HighResolution BiVO4 Wonseok MBE Cobalt HardDiskMedia CuFoil LFM GaN epitaxy SelfAssembly Litho SPMLabs Hair Gold CVD Lateral Biology Silicon C_AFM CHRYSALIS_INC Electical&Electronics Ceramic Hysteresys BCZT China SetpointMode Conductance molecular_beam Sic PatternedSapphireSubstrat temp