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Aqueous electromigration of single-walled carbon nanotubes and co-electromigration with copper ions.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Raja, Pavan Mv Esquenazi, Gibran L. Wright, Kourtney D. Gowenlock, Cathren E. Brinson, Bruce E. Alexander, Shirin Jones, Daniel R. Gangoli, Varun Shenoy Barron, Andrew R. |
| Copyright Year | 2018 |
| Abstract | The electromigration behaviour of raw and acid purified single walled carbon nanotubes (SWCNTs) in dilute aqueous systems (0.0034 mg mL-1), in the absence of surfactant, with the addition of either 0.85 M acetic acid or 0.1 M CuSO4, was evaluated using a 2-inch copper cathode and either a 2-inch copper or 0.5-inch platinum anode. The results showed that the electromigration of raw SWCNTs (with a high catalyst residue) in the presence of CuSO4 resulted in the formation of a Cu-SWCNT composite material at the cathode. In contrast, acid purified SWCNTs were observed to diffuse to a copper anode, creating fibrillated agglomerates with "rice-grain"-like morphologies. Upon acidification with acetic acid (or addition of CuSO4) the direction of electromigration reversed towards the cathode as a result of coordination of Cu2+ to the functional groups on the SWCNT overcoming the inherent negative charge of the acid purified SWCNTs. The result was the co-deposition of SWCNTs and Cu metal on the cathode. Addition of 0.005 M EDTA sequesters some of the Cu2+ and resulted in the separation of metal decorated SWCNTs to the cathode and un-decorated SWCNTs to the anode. The resulting SWCNT and Cu/SWCNT deposits were characterized by Raman spectroscopy, XPS, SEM, EDS, and TEM. |
| Starting Page | 19628 |
| Ending Page | 19637 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c8nr06485g |
| PubMed reference number | 30325388 |
| Journal | Medline |
| Volume Number | 10 |
| Issue Number | 41 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c8/nr/c8nr06485g/c8nr06485g1.pdf |
| Alternate Webpage(s) | https://cronfa.swan.ac.uk/Record/cronfa45492/Download/0045492-12112018104016.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/c8nr06485g |
| Journal | Nanoscale |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
