Synthesis and Magnetic Properties of Cobalt Oxide Nanowires Array With Columnar SBA-15

被引：10

作者：

Wang, X. Q. ^{[1
]}

Chen, M. ^{[1
]}

Huang, B. ^{[1
]}

Xu, J. C. ^{[1
]}

Peng, X. L. ^{[1
]}

Hong, B. ^{[1
]}

Jin, D. F. ^{[1
]}

Ge, H. L. ^{[1
]}

Jin, X. H. ^{[1
]}

机构：

[1] China Jiliang Univ, Coll Mat Sci & Engn, Zhejiang Prov Key Lab Magnetism, Hangzhou 310018, Zhejiang, Peoples R China

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2011年 / 47卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Antiferromagnetic materials; magnetic properties; mesoporous materials; nanowires; MESOPOROUS SILICA; NANOPARTICLES;

D O I：

10.1109/TMAG.2011.2147294

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Using hexagonal ordered straight-pore SBA-15 silica as hard template, mesoporous cobalt oxide (Co(3)O(4)) nanowires SBA-15 materials are synthesized by a nanoreplication route, and X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), field-emission scanning electron microscopy (FESEM), and physisorption isotherms are used to characterize the microstructure of columnar SBA-15 particles, Co(3)O(4)-doped SBA-15 (Co(3)O(4)/SBA-15) and Co(3)O(4) nanowires array. The results indicate that Co(3)O(4) exist in the mesochannels of SBA-15 to form Co(3)O(4)/SBA-15 nanocomposites and Co(3)O(4) nanowires present mesostructure. Furthermore, the magnetic properties of Co(3)O(4) nanowires array are measured and discussed by vibrating sample magnetometer (VSM) and surperconducting quantum interference device (SQUID), and the prepared Co(3)O(4) nanowires array present superparamagnetism. Owing to surface effect of the uncompensated spins at the surface of Co(3)O(4) nanowires, it presents a weak ferromagnetic behavior at low temperature.

引用

页码：2851 / 2854

页数：4

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