期刊
ACS NANO
卷 4, 期 2, 页码 905-912出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn901729d
关键词
dendrimer; gold nanoparticles; carbon nanotubes; nanomaterials
类别
资金
- U.S. National Science Foundation [0847957]
- Robert A. Welch Foundation [F-0032]
- Junta de Comunidades de Castilla-La Mancha (Spain)
- MICINN
- Marie Curie Reintegration Grants
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0847957] Funding Source: National Science Foundation
In this paper, we report the functionalization of the surface of multiwalled carbon nanotubes (MWNTs) with Au dendrimer encapsulated nanoparticles (DENS). The results show that, when pristine MWNTs having hydrophobic surfaces are exposed to DENs, the dendrimers aggregate on the MWNT surface. However, when the MWNTs are oxidized in acid prior to exposure to DENs, well-dispersed submonolayer coverages of Au nanoparticles are observed on the MWNT surface. This suggests that acid-induced debundling of the nanotubes is an essential prerequisite for attachment of nearly monodisperse DENS. Electron microscopy and NMR spectroscopy confirm that the structures of the DENS and dendrimers are retained after immobilization on the surface of acid-functionalized MWNTs.
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