Dispersion of single-walled carbon nanotubes modified with poly-l-tyrosine in water |
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Authors: | Kojima Mio Chiba Tomoka Niishima Junichiro Higashi Toshiaki Fukuda Takahiro Nakajima Yoshikata Kurosu Shunji Hanajiri Tatsuro Ishii Koji Maekawa Toru Inoue Akira |
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Affiliation: | Bio-Nano Electronics Research Centre, Toyo University 2100, Kujirai, Kawagoe, Saitama 350-8585, Japan. maekawa@toyo.jp. |
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Abstract: | In this study, complexes composed of poly-l-tyrosine (pLT) and single-walled carbon nanotubes (SWCNTs) were produced and the dispersibility of the pLT/SWCNT complexes in water by measuring the ζ potential of the complexes and the turbidity of the solution were investigated. It is found that the absolute value of the ζ potential of the pLT/SWCNT complexes is as high as that of SWCNTs modified with double-stranded DNA (dsDNA) and that the complexes remain stably dispersed in the water at least for two weeks. Thermogravimetry analysis (TGA) and visualization of the surface structures of pLT/SWCNT complexes using an atomic force microscope (AFM) were also carried out. |
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