Dye Quenching of Carbon Nanotube Fluorescence Reveals Structure-Selective Coating Coverage

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dc.citation.firstpage12148en_US
dc.citation.issueNumber9en_US
dc.citation.journalTitleACS Nanoen_US
dc.citation.lastpage12158en_US
dc.citation.volumeNumber14en_US
dc.contributor.authorZheng, Yuen_US
dc.contributor.authorAlizadehmojarad, Ali A.en_US
dc.contributor.authorBachilo, Sergei M.en_US
dc.contributor.authorKolomeisky, Anatoly B.en_US
dc.contributor.authorWeisman, R. Bruceen_US
dc.contributor.orgSmalley-Curl Instituteen_US
dc.date.accessioned2020-10-15T19:35:58Zen_US
dc.date.available2020-10-15T19:35:58Zen_US
dc.date.issued2020en_US
dc.description.abstractMany properties and applications of single-wall carbon nanotubes (SWCNTs) depend strongly on the coatings that allow their suspension in aqueous media. We report that SWCNT fluorescence is quenched by reversible physisorption of dye molecules such as methylene blue, and that measurements of that quenching can be used to infer structure-specific exposures of the nanotube surface to the surrounding solution. SWCNTs suspended in single-stranded DNA oligomers show quenching dependent on the combination of nanotube structure and ssDNA base sequence. Several sequences are found to give notably high or low surface coverages for specific SWCNT species. These effects seem correlated with the selective recognitions used for DNA-based structural sorting of nanotubes. One notable example is that dye quenching of fluorescence from SWCNTs coated with the (ATT)4 base sequence is far stronger for one (7,5) enantiomer than for the other, showing that coating coverage is associated with the coating affinity difference reported previously for this system. Equilibrium modeling of quenching data has been used to extract parameters for comparative complexation constants and accessible surface areas. Further insights are obtained from molecular dynamics simulations, which give estimated contact areas between ssDNA and SWCNTs that correlate with experimentally inferred surface exposures and account for the enantiomeric discrimination of (ATT)4.en_US
dc.identifier.citationZheng, Yu, Alizadehmojarad, Ali A., Bachilo, Sergei M., et al.. "Dye Quenching of Carbon Nanotube Fluorescence Reveals Structure-Selective Coating Coverage." <i>ACS Nano,</i> 14, no. 9 (2020) American Chemical Society: 12148-12158. https://doi.org/10.1021/acsnano.0c05720.en_US
dc.identifier.doihttps://doi.org/10.1021/acsnano.0c05720en_US
dc.identifier.urihttps://hdl.handle.net/1911/109416en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.subject.keywordsingle-stranded DNAen_US
dc.subject.keywordsingle-wall carbon nanotubeen_US
dc.subject.keywordSWCNT enantiomeren_US
dc.subject.keywordmethylene blueen_US
dc.subject.keywordphysisorbed quencheren_US
dc.subject.keywordspecific recognitionen_US
dc.subject.keywordmolecular dynamicsen_US
dc.titleDye Quenching of Carbon Nanotube Fluorescence Reveals Structure-Selective Coating Coverageen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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