Synthesis of Cobalt Oxide Nanotubes from Colloidal Particles Modified with a Co(III)-Cysteinato Precursor
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- 作者：Xiangyang Shi ; Shubo Han ; Raymond J. Sanedrin ; Feimeng Zhou ; and Matthias Selke
- 刊名：Chemistry of Materials
- 出版年：2002
- 出版时间：April 2002
- 年：2002
- 卷：14
- 期：4
- 页码：1897 - 1902
- 全文大小：231K
- 年卷期：v.14,no.4(April 2002)
- ISSN：1520-5002
文摘
The fabrication of cobalt oxide nanotubes (length 3-4 
m, width 200-400 nm) was achievedby a colloidal templating approach. In this approach, a Co(III)-cysteinato complex [Co(en)2(S-cys)]2+2(BF4-) was employed as the precursor of cobalt oxide. The infiltration behavior ofthe precursor into polyelectrolyte multilayers was studied with a quartz crystal microbalancewhich showed that the amount of the precursor incorporated increased with the number ofpolyelectrolyte (PE) layers. After incorporation of the precursor into PE multilayers precoatedonto submicron-sized polystyrene latex particles via the layer-by-layer deposition, theresulting composite colloidal particles became threaded in a pearl necklace-like structure.Upon calcination at an elevated temperature, cobalt oxide nanotubes were observed bytransmission electronic microscopy (TEM) and atomic force microscopy. High-resolution TEM,electron diffraction, energy-dispersive X-ray spectroscopy, and X-ray diffraction showed thatthese nanotubes were composed of spinel polycrystalline Co3O4. The preparation of suchcobalt oxide nanotubes affords a new avenue for the application of metal complexes andrepresents a promising route for the synthesis of novel inorganic nanotubes.
m, width 200-400 nm) was achievedby a colloidal templating approach. In this approach, a Co(III)-cysteinato complex [Co(en)2(S-cys)]2+2(BF4-) was employed as the precursor of cobalt oxide. The infiltration behavior ofthe precursor into polyelectrolyte multilayers was studied with a quartz crystal microbalancewhich showed that the amount of the precursor incorporated increased with the number ofpolyelectrolyte (PE) layers. After incorporation of the precursor into PE multilayers precoatedonto submicron-sized polystyrene latex particles via the layer-by-layer deposition, theresulting composite colloidal particles became threaded in a pearl necklace-like structure.Upon calcination at an elevated temperature, cobalt oxide nanotubes were observed bytransmission electronic microscopy (TEM) and atomic force microscopy. High-resolution TEM,electron diffraction, energy-dispersive X-ray spectroscopy, and X-ray diffraction showed thatthese nanotubes were composed of spinel polycrystalline Co3O4. The preparation of suchcobalt oxide nanotubes affords a new avenue for the application of metal complexes andrepresents a promising route for the synthesis of novel inorganic nanotubes.