Sainsbury Toby, Stolarczyk Jacek, Fitzmaurice Donald
Department of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
J Phys Chem B. 2005 Sep 1;109(34):16310-25. doi: 10.1021/jp051224c.
This paper reports the findings of a detailed study of the self-assembly of gold nanoparticles at the surface of carbon nanotubes (CNTs). The study included the development of a predictive model for the interactions (charge transfer, van der Waals, osmotic, elastic, nonelastic, and covalent) between tetraoctylammonium bromide-stabilized (TOAB) gold nanoparticles and alkyl- and alkylthiol-modified multiwalled carbon nanotubes (MWCNTs). It also included the measurement of the coverage of gold nanoparticles at the surface of the above MWCNTs as a function of increasing alkyl chain length. One key finding is that it is possible to predict with a high degree of accuracy using the above model the measured coverage of gold nanoparticles adsorbed, either noncovalently or covalently, at the surface of a MWCNT. Another key finding is that, as predicted, under well-defined conditions the measured coverage of nanoparticles is very sensitive to the nature of the modified CNT surface and the contiguous environment, providing valuable insights that will underpin the rational design of functional nanoscale devices assembled from nanoparticle and CNT building blocks.
本文报道了一项关于金纳米颗粒在碳纳米管（CNT）表面自组装的详细研究结果。该研究包括建立一个预测模型，用于研究溴化四辛基铵稳定的（TOAB）金纳米颗粒与烷基和烷基硫醇修饰的多壁碳纳米管（MWCNT）之间的相互作用（电荷转移、范德华力、渗透压、弹性、非弹性和共价相互作用）。研究还包括测量上述MWCNT表面金纳米颗粒的覆盖率随烷基链长度增加的变化情况。一个关键发现是，使用上述模型可以高度准确地预测在MWCNT表面非共价或共价吸附的金纳米颗粒的测量覆盖率。另一个关键发现是，正如预测的那样，在明确的条件下，纳米颗粒的测量覆盖率对修饰的CNT表面性质和相邻环境非常敏感，这为基于纳米颗粒和CNT构建块组装功能性纳米器件的合理设计提供了有价值的见解。
