Reactions of alkyl-radicals with gold and silver nanoparticles in aqueous solutions |
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Authors: | Zidki Tomer Cohen Haim Meyerstein Dan |
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Affiliation: | Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva, Israel. |
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Abstract: | Silver and gold nanoparticles are very efficient catalysts for the dimerization of methyl-radicals in aqueous solutions. The rate constants for the reaction of methyl-radicals with the gold and silver nanoparticles were measured and found to be 3.7 x 10(8) M(-1) s(-1) and 1.4 x 10(9) M(-1) s(-1), respectively. The results thus suggest that alkyl-radicals, also not reducing ones, are scavenged by these nanoparticles. This might explain the role, if such a role exists, of these nanoparticles in medical applications. |
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