Colloidal Polymerization of Polymer-Coated Ferromagnetic Nanoparticles into Cobalt Oxide Nanowires

被引：144

作者：

Keng, Pei Yuin ^{[1
]}

Kim, Bo Yun ^{[1
]}

Shim, In-Bo ^{[2
]}

Sahoo, Rabindra ^{[1
]}

Veneman, Peter E. ^{[1
]}

Armstrong, Neal R. ^{[1
]}

Yoo, Heemin ^{[1
]}

Pemberton, Jeanne E. ^{[1
]}

Bull, Mathew M. ^{[1
]}

Griebel, Jared J. ^{[1
]}

Ratcliff, Erin L. ^{[1
]}

Nebesny, Kenneth G. ^{[1
]}

Pyun, Jeffrey ^{[1
]}

机构：

[1] Univ Arizona, Dept Chem, Tucson, AZ 85721 USA

[2] Kookmin Univ, Dept Nano & Elect Phys, Seoul 136702, South Korea

来源：

ACS NANO | 2009年 / 3卷 / 10期

基金：

美国国家科学基金会;

关键词：

magnetic nanoparticles; cobalt nanoparticles; ferromagnetic nanoparticles; cobalt oxide nanowires; Co3O4; nanowires; electrochemistry; Raman spectroscopy; photoelectron spectroscopy; magnetic assembly; dipolar assembly; colloidal polymerization; LITHIUM-ION BATTERIES; THIN-FILMS; HOLLOW SPHERES; SUPRAMOLECULAR POLYMERIZATION; ELECTROCHEMICAL DEPOSITION; SOLVOTHERMAL SYNTHESIS; MAGNETIC NANOWIRES; CO3O4; NANOFIBERS; DIPOLAR CHAINS; NANOCRYSTALS;

D O I：

10.1021/nn900483w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The preparation of polystyrene-coated cobalt oxide nanowires is reported via the colloidal polymerization of polymer-coated ferromagnetic cobalt nanoparticles (PS-CoNPs). Using a combination of dipolar nanoparticle assembly and a solution oxidation of preorganized metallic colloids, interconnected nanoparticles of cobalt oxide spanning micrometers in length were prepared, The colloidal polymerization of PS-CoNPs into cobalt oxide (CoO and Co3O4) nanowires was achieved by bubbling O-2 into PS-CoNP dispersions in 1,2-dichlorobenzene at 175 degrees C. Calcination of thin films of PS-coated cobalt oxide nanowires afforded Co3O4 metal oxide materials. Transmission electron microscopy (TEM) revealed the formation of interconnected nanoparticles; of cobalt oxide with hollow inclusions, arising from a combination of dipolar assembly of PS-CoNPs and the nanos(ale Kirkendall effect in the oxidation reaction. Using a wide range of spectroscopic and electrochemical characterization techniques, we demonstrate that cobalt oxide nanowires prepared via this novel methodology were electroactive with potential applications as nanostructured electrodes for energy storage.

引用

页码：3143 / 3157

页数：15

共 105 条

[1] Metal oxide photoanodes for solar hydrogen production [J].