Microcrystalline composite particles of carbon nanotubes and calcium carbonate

被引:13
作者
Ford, William E. [1 ]
Yasuda, Akio [2 ]
Wessels, Jurina M. [1 ]
机构
[1] Sony Deutschland GmbH Hedelfingerstr 61, Stuttgart Technol Ctr, Mat Sci Lab, D-70327 Stuttgart, Germany
[2] Sony Corp Gotenyanma Technol Ctr, Life Sci Lab, Tokyo 1410001, Japan
关键词
D O I
10.1021/la7026797
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Coprecipitation of urea-melt modified carbon nanotubes and calcium carbonate from an aqueous solution by two methodsyielded microcrystalline composite particles. Powders obtained by colloidal crystallization from a supersaturated solution that were isolated and dried soon after precipitation were a mixture of raspberry-shaped and rhombohedral particles. These were shown by infrared and X-ray diffraction analyses to be mainly calcite. Particles that were kept wet for 1 day or longer before being isolated were typically entirely rhombohedral with edge lengths in the range of 5-30 mu m. Scanning electron microscopy investigations revealed that the nanotubes were adsorbed on the particle surface and also incorporated into the interior matrix. Removal of the calcium carbonate component by treating the particles with acid yielded nanotube shells whose size and shape reflected those of the original particles.
引用
收藏
页码:3479 / 3485
页数:7
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