Journal article
Effect of Thermal Treatment on the Structure of Multi-walled Carbon Nanotubes
Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, v 8(5), pp 615-625
Oct 2006
Abstract
The effects of vacuum annealing and oxidation in air on the structure of multi-walled carbon nanotubes (MWCNTs) produced by a large-scale catalytic chemical vapor deposition (CCVD) process are studied using Raman spectroscopy and transmission electron microscopy (TEM). A detailed Raman spectroscopic study of as-produced nanotubes has also been conducted. While oxidation in air up to 400°C removes disordered carbon, defects in tube walls are produced at higher temperatures. TEM reveals that MWCNTs annealed at 1,800°C and above become more ordered than as-received tubes, while the tubes annealed at 2,000°C exhibit polygonalization, mass transfer and over growth. The change in structure is observable by the separation of the Raman G and D′ peaks, a lower R-value (I
D/I
G ratio), and an increase in the intensity of the second order peaks. Using wavelengths from the deep ultraviolet (UV) range (5.08 eV) extending into the visible near infrared (IR) (1.59 eV), the Raman spectra of MWCNTs reveal a dependence of the D-band position proportional to the excitation energy of the incident laser energies.
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Details
- Title
- Effect of Thermal Treatment on the Structure of Multi-walled Carbon Nanotubes
- Creators
- K Behler - Department of Materials Science and Engineering, and A.J. Drexel Nanotechnology Institute Drexel University 3141 Chestnut Street Philadelphia PA 19104 USAS Osswald - Department of Materials Science and Engineering, and A.J. Drexel Nanotechnology Institute Drexel University 3141 Chestnut Street Philadelphia PA 19104 USAH Ye - Department of Materials Science and Engineering, and A.J. Drexel Nanotechnology Institute Drexel University 3141 Chestnut Street Philadelphia PA 19104 USAS Dimovski - Department of Materials Science and Engineering, and A.J. Drexel Nanotechnology Institute Drexel University 3141 Chestnut Street Philadelphia PA 19104 USAY Gogotsi - Department of Materials Science and Engineering, and A.J. Drexel Nanotechnology Institute Drexel University 3141 Chestnut Street Philadelphia PA 19104 USA
- Publication Details
- Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, v 8(5), pp 615-625
- Publisher
- Kluwer Academic Publishers; Dordrecht
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000241949000008
- Scopus ID
- 2-s2.0-33751010493
- Other Identifier
- 991014878012604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Multidisciplinary
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology