Growth of calcium carbonate on non-covalently modified carbon nanotubes
- 作者：Dimitrios Tasis ; Stergios Pispas ; Costas Galiotis ; Nikolaos Bouropoulos
- 关键词：Carbon nanotubes ; Calcium carbonate ; Crystal growth ; Crystal morphology ; Amphiphilic block copolymers
- 刊名：Materials Letters
- 出版年：2007
- 期刊代码：59_0167577x
- 类别：ms
- 出版时间：November 2007
- 卷：61
- 期：28
- 页码：5044-5046
- 文件大小：356 K
摘要
The crystallization of calcium carbonate was investigated on pristine and non-covalently modified carbon nanotubes (CNTs) using the vapor diffusion technique in a calcium chloride solution. Non-covalent modification was accomplished by treating the carbon nanostructures with the amphiphilic copolymer poly(isoprene-b-acrylic acid). Calcium carbonate crystals grown on the surface and in the interstitial channels of CNT buckypapers were observed in both cases. Scanning electron microscopy analysis of the untreated CNTs showed the characteristic rhombohedral morphology of calcite crystals, while in the case of modified material spherical and ellipsoidal crystals, consisted of nanocrystallites, were observed. X-ray diffraction analysis showed the presence of calcite crystals in both cases.