水中的富勒烯基表面活性剂的球形双层囊泡:激光光散射研究
1Department of Chemistry, State University of New York, Stony Brook, NY 11794, USA.
Science (New York, N.Y.)
|March 10, 2001
概括
修改后的富勒烯形成水溶性离子,自组装成稳定的球状囊泡. 这一发现增强了烯在水性生物系统中的应用潜力.
科学领域:
- 超分子化学 超分子化学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 富勒烯在水中具有有限的溶解性,阻碍了它们的生物应用.
- 化学修饰可以产生水溶性烯衍生物,能够自组装.
研究的目的:
- 为了研究在水溶液中法烯离子的聚合行为.
- 描述由这些自组装的富勒烯衍生物形成的结构.
主要方法:
- 激光光散射被用来研究五富勒烯 (Ph5C60K) 在水中的相关性.
- 测量了水力动力半径和旋转半径,以确定囊泡特征.
主要成果:
- 五基富勒烯离子 (Ph5C60-) 在水中形成稳定的双层,形成球状囊泡.
- 这些囊泡的平均水力动力半径和旋转半径大约为17 nm.
- 自组装发生在非常低的临界聚合度 (<10-7M) 时.
- 这些囊泡中的平均聚合数约为1.2 x 10^4.4.
结论:
- 五基富勒烯离子可以在水中自我组装成明确的,稳定的超分子结构.
- 纳米级囊泡的形成显著扩大了在生物和纳米技术领域充分利用的范围.
- 在低度下达到高聚合数,凸显了这种自组装工艺的效率.
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