Efficient isolation and solubilization of pristine single-walled nanotubes in bi

2020-02-15 01:54:54

absorption spectra nanotubes micelles dissolving

责任者: Wenseleers, W.;Vlasov, I.I.;Goovaerts, E.;Obraztsova, E.D.;Lobach, A.S.;Bouwen, A. 单位: Dept. of Phys., Antwerp Univ., Antwerpen, Belgium 来源出处: Advanced Functional Materials(Adv. Funct. Mater. (Germany)),2004/11/,14(11):1105-12 摘要: We have investigated a wide variety of surfactants for their efficiency in dissolving isolated single-walled carbon nanotubes (SWNTs) in water. In doing so, we have completely avoided the harsh chemical or mechanical conditions, such as acid or ultrasonic treatments, that are known to damage SWNTs. Bile salts in particular, are found to be exceptionally effective in dissolving individual tubes, as evidenced by highly resolved optical absorption spectra, bright bandgap fluorescence, and the unprecedented resolution (~2.5 cm-1) of the radial breathing modes in Raman spectra. This is attributed to the formation of very regular and stable micelles around the nanotubes providing an unusually homogeneous environment. Quantitative information concerning the degree of solubilization is obtained from absorption spectroscopy 关键词: carbon nanotubes;colloids;dissolving;fluorescence;Raman spectra;solid solubility;surfactants;solubilization;pristine single walled nanotubes;bile salt micelles;surfactant;optical absorption spectra;radial breathing modes;Raman spectra;dissolving;SWNT;bright bandgap fluorescence;C