Synthesis and electronic properties of ZnO∕CoZnO core-shell nanowires

ZnO ∕ CoZnO core-shell nanowires have been synthesized by depositing an epitaxial layer of CoxZn1−xO (x=0.05−0.25) onto single-crystalline ZnO nanowires via pulsed-laser deposition. Detailed material analysis confirmed the core-shell structure and revealed a homogeneous distribution of Co atoms in the ZnO lattice. Field-effect transistors have been fabricated based on individual ZnO∕CoZnO nanowires. These devices exhibited n-type transistor characteristics and intriguing magnetoresistance below 30K.