Growth Mechanism and Magnetic Properties of Highly Crystalline NiO Nanocubes and Nanorods Fabricated by Evaporation

被引：25

作者：

Chen, Da-Peng ^{[1
]}

Wang, Xiao-Lin ^{[1
]}

Du, Yi ^{[1
]}

Ni, Song ^{[2
]}

Chen, Zi-Bin ^{[2
]}

Liao, Xiaozhou ^{[2
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2519, Australia

[2] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

来源：

CRYSTAL GROWTH & DESIGN | 2012年 / 12卷 / 06期

基金：

澳大利亚研究理事会;

关键词：

THERMAL-DECOMPOSITION; NANOPARTICLES; SIZE; SURFACE; OXIDES; MNO;

D O I：

10.1021/cg201676u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new approach to the preparation of regularly shaped NiO nanocubes and nanorods by an infrared heating evaporation method is presented. The growth model is proposed to be a vapor solid mechanism. The morphology of the nanocrystals can be tuned by the carrier gas flow rate. The samples consist of nanocrystals that are highly crystallized with atomic-scale smooth surfaces. This novel method could be extended to nanocrystal growth of other oxides with low volatility or high melting points. The results of magnetic characterization indicate that the NiO nanorods and nanocubes grown from a mixed target both show weak ferromagnetic states at low and room temperature due to uncompensated spins at the surfaces of the nanocrystals.

引用

页码：2842 / 2849

页数：8