Controlling the electrophoretic mobility of single-walled carbon nanotubes : a comparison of theory and experiment
The electrophoretic mobilities of single-walled carbon nanotubes (SWNTs) in agarose gels subjected to negatively charged covalent functionalization and noncovalent anionic surfactant adsorption are compared using a simplified hydrodynamic model. Net charges are calculated on the basis of estimated f...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1991. - 23(2007), 14 vom: 03. Juli, Seite 7768-76 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2007
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Comparative Study Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 4-hydroxybenzene diazonium Anions Cations Diazonium Compounds Nanotubes, Carbon Phenols mehr... |
| Zusammenfassung: | The electrophoretic mobilities of single-walled carbon nanotubes (SWNTs) in agarose gels subjected to negatively charged covalent functionalization and noncovalent anionic surfactant adsorption are compared using a simplified hydrodynamic model. Net charges are calculated on the basis of estimated friction coefficients for cylindrical rodlike particles. The effects of functionalization with negatively charged 4-hydroxybenzene diazonium and anionic sodium cholate are quantified and compared with model predictions. The adsorption of Na+ counterions into the nonionic surfactant layer adsorbed on SWNTs (Triton-X-405) is shown to induce a positive charge and reverse the mobility under select conditions. This effect has not been identified or quantified for nanoparticle systems and may be important in the processing of these systems |
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| Beschreibung: | Date Completed 14.09.2007 Date Revised 01.12.2018 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 0743-7463 |