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Assembly, structure and electrical conductance of carbon nanotube-gold nanoparticle 2D heterostructures

Assembly, structure and electrical conductance of carbon nanotube-gold nanoparticle 2D heterostructures
Assembly, structure and electrical conductance of carbon nanotube-gold nanoparticle 2D heterostructures
Thiol-functionalised multiwalled carbon nanotubes (MWNTs, average outside diameter 10 nm) assemble into thin films on a liquid–liquid interface. Combined with citrate-stabilised gold nanoparticles (NPs, average diameter 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 cm2. 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 m regime as compared to the macroscopic regime.
metal nanoparticles, purification, monolayer, liquid/liquid interface, nanocrystals, nanohybrids, deposition, composite-materials
2249-2256
Marsh, Dan H.
d5a1ef32-05bf-4849-b3af-1c1c79193463
Rance, Graham A.
d0e90224-85ce-49cc-9280-67ec7ea727df
Whitby, Richard J.
45632236-ab00-4ad0-a02d-6209043e818b
Giustiniano, Francesco
f2692f6a-8f0a-49de-aa5d-7c2dff402545
Khlobystov, Andrei N.
27b2c834-ce18-4106-9cbe-17e2968551a4
Marsh, Dan H.
d5a1ef32-05bf-4849-b3af-1c1c79193463
Rance, Graham A.
d0e90224-85ce-49cc-9280-67ec7ea727df
Whitby, Richard J.
45632236-ab00-4ad0-a02d-6209043e818b
Giustiniano, Francesco
f2692f6a-8f0a-49de-aa5d-7c2dff402545
Khlobystov, Andrei N.
27b2c834-ce18-4106-9cbe-17e2968551a4

Marsh, Dan H., Rance, Graham A., Whitby, Richard J., 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), 2249-2256. (doi:10.1039/b801334a).

Record type: Article

Abstract

Thiol-functionalised multiwalled carbon nanotubes (MWNTs, average outside diameter 10 nm) assemble into thin films on a liquid–liquid interface. Combined with citrate-stabilised gold nanoparticles (NPs, average diameter 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 cm2. 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 m regime as compared to the macroscopic regime.

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More information

Published date: 2008
Keywords: metal nanoparticles, purification, monolayer, liquid/liquid interface, nanocrystals, nanohybrids, deposition, composite-materials

Identifiers

Local EPrints ID: 54479
URI: http://eprints.soton.ac.uk/id/eprint/54479
PURE UUID: 7512d971-90f0-4c5b-8ecc-bccab4cebc4c
ORCID for Richard J. Whitby: ORCID iD orcid.org/0000-0002-9891-5502
ORCID for Francesco Giustiniano: ORCID iD orcid.org/0000-0001-9277-8538

Catalogue record

Date deposited: 19 Aug 2008
Last modified: 17 Dec 2019 02:04

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