Journal
NANOSCALE
Volume 6, Issue 24, Pages 14872-14876Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr04852k
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Funding
- National Basic Research Program of China (973Program) [2012CB821505]
- National Natural Science Foundation of China [91027040, 21204059, 21204058, 21274103, 21104054]
- Natural Science Foundation of Jiangsu Province [BK2011300]
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In this paper we demonstrate a novel complex array structure comprising well-aligned Au nanorods (10 nm in diameter) encapsulated inside 15 nm radius multiwalled carbon nanotubes (MWCNTs). A pre-aligned and open-ended nanoporous MWCNT membrane is used as the starting material. Au nanorods are precisely deposited and aligned inside the hollow channels of CNTs by inter-diffusing the HAuCl4 precursor and the reductant solution. Ultra-long Au nanowires and spherical Au nanoparticles are also observed in the CNT cavity with the same diameter in special cases. Using high-resolution TEM (HRTEM), scanning transmission electron microscopy (STEM), 3-dimensional TEM (3D-TEM) and energy dispersive X-ray spectroscopy (EDX), the precise location and composition of the encapsulated Au components with various structures are confirmed. This aligned Au@CNT endohedral material has important potential applications in nanocatalysis, waveguides, as well as in novel plasmonic devices.
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