关键词: ZnO, 纳米棒, 掺杂, 热等离子体

Abstract: One dimensional ZnO nanostructures doped with Mn were synthesized using a radio frequency (RF) thermal plasma with the mixture of Zn and MnCl2 powders as staring materials. The influences of Mn doping on the morphology and properties of synthesized products were investigated. It is found that the peak positions of (100), (002) and (101) shift a little to the smaller 2q, which confirms that Mn is doped into ZnO crystal lattice. SEM, TEM and HRTEM were used to characterize the synthesized Mn doped one dimensional ZnO. The length of synthesized doped ZnO decreases from about 2 mm to 200 nm, and the diameter increases from about 30 nm to 100 nm when the mole ratio of Mn to Zn increases to 4%, respectively. The synthesized one dimensional Mn doped ZnO nanostructures exhibit ferromagnetism under normal temperature, and the magnetization increases with the increase of doped Mn concentration.

Key words: ZnO, one-dimension nanostructure, doping, thermal plasma