Effect of Atmosphere on the Growth of MnCr2O4 Spinel Nanowires

Abstract

Abstract:

MnCr₂O₄ spinel single-crystalline nanowires were synthesized by heating commercial stainless steel foil under a reducing atmosphere. The hydrogen content in the atmosphere has important influence on the yield and morphology of the grown nanowires. It was found that the reducing atmosphere plays a key role in the nanowire growth. In the reducing atmosphere, the Mn and Cr elements in the stainless steel could be selectively oxidized because of their higher affinity for oxygen than the Fe and Ni elements. The Fe and Ni elements in the stainless steel, however, acted as the catalyst for the vapor-liquid-solid(VLS) growth of the MnCr₂O₄ nanowires.

Key words: MnCr₂O₄ nanowire, Stainless steel foil, Atmosphere, VLS growth mechanism

CLC Number:

O614

TrendMD:

LUO Li-Jie, TONG Zhang-Fa, MO Li-Bin, LIANG Zhong-Yuan, CHEN Yong-Jun*. Effect of Atmosphere on the Growth of MnCr2O4 Spinel Nanowires[J]. Chem. J. Chinese Universities, 2009, 30(4): 647.

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