Issue 14, 2012

Mixed monolayer protected gold atom–oxide cluster synthesis and characterization

Abstract

Small atomic gold clusters in solution, Aun, stabilized by cetyl trimethylammonium bromide (CTAB) and cysteine, have been synthesized potentiodynamically in quiescent aqueous solutions. The electrodissolution of gold to gold ions during an anodic scan and subsequent cluster formation during a cathodic scan in underpotential (UPDD) and overpotential dissolution–deposition (OPDD) regions were studied. The experimental potentiodynamic IE profiles and chronoamperometric it transients are fit into reported theoretical models of adsorption and electrocrystallization. The plausible application of clusters/cluster film to cysteine sensing based on fluorescence quenching and square wave stripping voltammetry is demonstrated.

Graphical abstract: Mixed monolayer protected gold atom–oxide cluster synthesis and characterization

Supplementary files

Article information

Article type
Paper
Submitted
25 Feb 2012
Accepted
21 Apr 2012
First published
24 Apr 2012

Nanoscale, 2012,4, 4130-4137

Mixed monolayer protected gold atom–oxide cluster synthesis and characterization

S. R. Nambiar, P. K. Aneesh, C. Sukumar and T. P. Rao, Nanoscale, 2012, 4, 4130 DOI: 10.1039/C2NR30446E

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