Size dependent aqueous dispersibility of carboxylated multiwall carbon nanotubes

dc.contributor.authorNtim, Susana Addo
dc.contributor.authorSae-Khow, Ornthida
dc.contributor.authorDesai, Chintal
dc.contributor.authorWitzmann, Frank A.
dc.contributor.authorMitra, Somenath
dc.contributor.departmentCellular and Integrative Physiology, School of Medicine
dc.date.accessioned2025-06-23T14:11:17Z
dc.date.available2025-06-23T14:11:17Z
dc.date.issued2012
dc.description.abstractThe size dependent colloidal behavior of aqueous dispersions of carboxylated multiwall carbon nanotubes (c-MWCNTs) is presented. The presence of carboxylic groups provided electrostatic stabilization in water, where the size affected agglomeration. While aspect ratio did not show any definite correlation, the hydrophobicity indices (HI), zeta potential and aggregation kinetics showed dependence on the length of the c-MWCNTs where the shorter c-MWCNTs showed significantly lower HI values, smaller particle aggregates, higher zeta potential values and higher critical coagulation concentrations (ccc) in the presence of electrolytes. Although the diameter of the short c-MWCNTs did not appear to influence their aggregation behavior, the longer c-MWCNTs showed a dependence on diameter where stability decreased with increasing CNT diameter.
dc.eprint.versionAuthor's manuscript
dc.identifier.citationNtim SA, Sae-Khow O, Desai C, Witzmann FA, Mitra S. Size dependent aqueous dispersibility of carboxylated multiwall carbon nanotubes. J Environ Monit. 2012;14(10):2772-2779. doi:10.1039/c2em30405h
dc.identifier.urihttps://hdl.handle.net/1805/48922
dc.language.isoen_US
dc.publisherRoyal Society of Chemistry
dc.relation.isversionof10.1039/c2em30405h
dc.relation.journalJournal of Environmental Monitoring
dc.rightsPublisher Policy
dc.sourcePMC
dc.subjectCarbon nanotubes
dc.subjectParticle Size
dc.subjectWater
dc.titleSize dependent aqueous dispersibility of carboxylated multiwall carbon nanotubes
dc.typeArticle
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