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Scanning electron microscopy study of carbon nanotubes heated at high temperatures in air
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lu, Xuekun Ausman, Kevin D. Piner, Richard D. Ruoff, Rodney S. |
| Copyright Year | 1999 |
| Abstract | Multiwalled carbon nanotubes (MWNTs) were dispersed in 2-butanol and dropped onto a V-ridge, lithographically patterned Si substrate that was coated with a thin layer of gold. These MWNTs were shown by scanning electron microscopy (SEM) to conform to the V-ridge surface topology at room temperature, which is thus useful for introducing kinks (at the apex of the V-ridge and the bottom of the trenches between V ridges). The substrate-supported MWNTs were then heated in air at temperatures from 673 to 1173 K for varying exposure times and were monitored with SEM. A 122 kJ mol−1 activation energy for complete oxidation was obtained, and preferential oxidation at kink sites was observed on some MWNTs at high temperatures. The dominant mode of oxidation was either thinning of the walls of the MWNTs or sequential oxidation of the component tubes in bundles. Some MWNTs, which at room temperature conformed to the V-ridge surface topology, detached (“sprang” away) from the substrate surface, demonstrating that the ... |
| Starting Page | 186 |
| Ending Page | 189 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1063/1.370715 |
| Volume Number | 86 |
| Alternate Webpage(s) | http://utw10193.utweb.utexas.edu/Archive/RuoffsPDFs/80.pdf |
| Alternate Webpage(s) | https://doi.org/10.1063/1.370715 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
