Controlling the electrophoretic mobility of single-walled carbon nanotubes: A comparison of theory and experiment

BibTex:
Research areas:	Uncategorized	Year:	2007
Type of Publication:	Article
Authors:	Monica L. Usrey, Daniel E. Agnew Nitish Nair
Journal:	Langmuir	Volume:	23
Number:	14	Pages:	7768-7776
Month:	JUL 3 2007

@article{RefWorks:974, author = "Monica L. Usrey,Nitish Nair,Daniel E. Agnew,Cesar F. Pina,Michael S. Strano", abstract = "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.", isbn = "0743-7463", journal = "Langmuir", month = "JUL 3 2007", note = "PT: J; TC: 15; UT: WOS:000247487200056", number = "14", pages = "7768-7776", title = "{C}ontrolling the electrophoretic mobility of single-walled carbon nanotubes: {A} comparison of theory and experiment", volume = "23", year = "2007", }
Note:	PT: J; TC: 15; UT: WOS:000247487200056
Abstract:	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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