Journal article
Effect of Graphitization on the Wettability and Electrical Conductivity of CVD-Carbon Nanotubes and Films
The journal of physical chemistry. B, v 110(20), pp 9850-9855
25 May 2006
PMID: 16706438
Abstract
The use of carbon nanomaterials in various applications requires precise control of their surface and bulk properties. In this paper, we present a strategy for modifying the surface chemistry, wettability, and electrical conductivity of carbon tubes and films through annealing in a vacuum. Experiments were conducted with 60−300 nm nanotubes (nanopipes), produced by noncatalytic chemical vapor deposition (CVD) in a porous alumina template, and with thin films deposited by the same technique on a glassy carbon substrate having the same structure and chemistry of the CNTs. The surface of the as-produced CVD-carbon, treated with sodium hydroxide to remove the alumina template, is hydrophilic, and the bulk electrical conductivity is lower by a factor of 20 than that of fully graphitic multiwalled nanotubes (MWNT) or bulk graphite. The bulk electrical conductivity increases to the conductivity of graphite after annealing at 2000 °C in a high vacuum. The analysis of CNTs by transmission electron microscopy (TEM) and Raman spectroscopy shows the ordering of carbon accompanied by an exponential increase of the in-plane crystallite size, L a, with increasing annealing temperature. Environmental scanning electron microscopy (ESEM) was used to study the interaction of CNT with water, and contact angle measurements performed using the sessile drop method on CVD-carbon films demonstrate that the contact angle increases nearly linearly with increasing annealing temperature.
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Details
- Title
- Effect of Graphitization on the Wettability and Electrical Conductivity of CVD-Carbon Nanotubes and Films
- Creators
- D MattiaM. P RossiB. M KimG KornevaH. H BauY Gogotsi
- Publication Details
- The journal of physical chemistry. B, v 110(20), pp 9850-9855
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000237626400022
- Scopus ID
- 2-s2.0-33745774405
- Other Identifier
- 991014878527804721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Biophysics
- Chemistry, Physical