Abstract
The size-controlled synthesis of monodispersed gold nanoparticles (AuNPs) stabilizedby polyelectrolyte-functionalized ionic liquid (PFIL) is described. The resultingAuNPs’ size, with a narrow distribution, can be tuned by the concentration ofHAuCl4.Such PFIL-stabilized AuNPs (PFIL-AuNPs) showed a high stability in water at room temperaturefor at least one month; they were also quite stable in solutions of pH 7–13 and high concentrationof NaCl. In addition, the PFIL-AuNPs exhibited obvious electrocatalytical activity towardβ-nicotinamide adenine dinucleotide (NADH for short, a cofactor in enzymatic reactions ofNAD+/NADH−-dependent dehydrogenases) oxidation, suggesting a potential application forbioelectroanalysis.
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