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Aggregation and Deposition of C60 in Aqueous Systems
Citation:
MA, X. AND D. BOUCHARD. Aggregation and Deposition of C60 in Aqueous Systems. Presented at 236th ACS National Meeting & Exposition, Philadelphia, PA, August 17 - 21, 2008.
Impact/Purpose:
The goal of this work is to investigate quantitatively the deposition of colloidal C60 and C60 derivatives on a variety of surfaces using quartz crystal microbalance (QCM) techniques.
Description:
The extremely low water solubility of many fullerenes precludes aqueous solution processing for engineering applications and minimizes the potential for fullerene environmental effects in aqueous environments. However, studies have shown that C60 fullerene can form stable colloidal suspensions in water that result in C60 aqueous concentrations many orders of magnitude above C60’s aqueous solubility. The effects of solution chemistry on the magnitude and kinetics of fullerene deposition will be explored. Atomic force microscopy (AFM) will also be used to probe the structure of aggregates deposited on QCM crystal surfaces. In addition, deposition under favorable and unfavorable conditions will be measured with the QCM to allow estimation of attachment efficiencies that will be compared with empirically derived measures from colloid transport studies using porous media columns.