Spectroscopic analysis of two distinct equilibrium states for the exchange reaction of sodium cholate and oligo-DNA on single-walled carbon nanotubes

Yuichi Kato, Yasuro Niidome, Naotoshi Nakashima

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    Understanding the quantitative analysis of the transition adsorption structures of molecules on single-walled carbon nanotubes (SWNTs) is of importance from the point of view of both fundamental science and applications of nanotubes. Absorption spectroscopy reveals that two different equilibrium states are existent for the exchange reaction of sodium cholate (SC) and oligo-DNA (single-stranded 20-mer cytosine) on SWNTs. This is derived from the transitions of the adsorption structures of different chirality-types of SWNTs and SC/DNA at certain SC concentrations below the critical micelle concentration of SC. How to equilibrate? Absorption spectroscopy reveals that two different equilibrium states are existent for the exchange reaction (see picture) of sodium cholate (SC) and oligo-DNA on single-walled carbon nanotubes (SWNTs). This is derived from the transitions of the adsorption structures of different chirality-types of SWNTs and SC/DNA at certain SC concentrations below the critical micelle concentration of SC.

    Original languageEnglish
    Pages (from-to)1652-1655
    Number of pages4
    JournalChemPhysChem
    Volume14
    Issue number8
    DOIs
    Publication statusPublished - Jun 3 2013

    All Science Journal Classification (ASJC) codes

    • Atomic and Molecular Physics, and Optics
    • Physical and Theoretical Chemistry

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