Marsh, Dan H. and Rance, Graham A. and Whitby, Richard J. and Giustiniano, Francesco and Khlobystov, Andrei N. (2008) Assembly, structure and electrical conductance of carbon nanotube-gold nanoparticle 2D heterostructures. JOURNAL OF MATERIALS CHEMISTRY, 18 (19). pp. 2249-2256.
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Thiol-functionalised multiwalled carbon nanotubes (MWNTs, average outside diameter similar to 10 nm) assemble into thin films on a liquid-liquid interface. Combined with citrate-stabilised gold nanoparticles ( NPs, average diameter similar to 10 nm) MWNTs form uniform, extended quasi-2D nanotube-nanoparticle heterostructures which, being on average only a few tens of nm thick, are self-supporting on the microscale and can span macroscopic surface areas up to 10 cm(2). MWNTs in these heterostructures are interwoven and interlinked with nanoparticles. The nanotube : nanoparticle ratio in the film can be conveniently controlled by the ratio of components in the liquid phase. The electrical resistance of MWNT-NP composites varies only slightly with the percentage of nanoparticles incorporated in the film, indicating that the electrical properties of these structures are mostly defined by nanotubes. The effect of the presence of nanoparticles on the resistance of MWNT-NP films is highly dependent on the scale of the measurements ( electrode geometry) and is qualitatively different for the sub-50 mu m regime as compared to the macroscopic regime.
|Subjects:||Material Science > Functional and hybrid materials|
Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
|Deposited By:||Farnush Anwar|
|Deposited On:||07 Jan 2009 10:50|
|Last Modified:||22 Jan 2009 09:03|
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