Interaction between colloidal particles of C-60 hydrosol and cationic dyes

Interaction of the dispersed phase of the fullerene C-60 hydrosol with ca t ionic dyes, Indopolycarbocyanines, Methylene Blue and others, results in th e adsorption of the dyes on the surface of colloidal particles. The phenome non is accompanied by expressed changes in the absorption spectra of all th e dyes, as well as in fluorescence quenching in the case of Indotricarbocya nine, and leads to the coagulation of the sol. The structural forces, cause d by hydrophobization of the fullerene-water interface, play a decisive rol e in the coagulation phenomena. (C) 2001 Elsevier Science B.V. All rights r eserved.