Investigation of colloidal suspension of SWCNT and γ-Cyclodextrin Using AFM and molecular dynamics simulation

Minghui Chai, Srinivas Ravi, Mark P. Kujawski, Leela Rakesh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Dispersal agents can increase the surface interaction between SWCNTs and water via coating themselves on the surfaces of SWCNTs, thus to solubilize and disperse SWCNTs in water. In this study, we have used γ-cyclodextrins (γ-CDs) to solubilize SWCNTs in water. A dark SWCNT-water colloidal suspension has been formed, while the system of SWCNTs alone in water looks like clear water with black precipitates. AFM images of SWCNTs prepared from the colloidal solution with γ-CDs clearly showed that γ-CD molecules decorated the surface of each SWCNT with a height around 4 nm. The images (in the same scanning range) also contain more SWCNTs than the ones of the SWCNTs alone (~ 18 nm in height, as a bundle structure). Force-distance curves (FDCs) have been measured to further probe the interaction between SWCNTs and γ-CDs. Molecular dynamics (MD) simulation has also been performed for understanding such interaction.

Original languageEnglish
Title of host publicationNanoparticles
Subtitle of host publicationSynthesis, Stabilization, Passivation, and Functionalization
PublisherAmerican Chemical Society
Pages402-416
Number of pages15
ISBN (Print)9780841269699
DOIs
StatePublished - Sep 19 2008

Publication series

NameACS Symposium Series
Volume996
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

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