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Direct Electrodeposition of Gold Nanoparticles onto Indium Tin Oxide Film Coated Glass: Application to the Detection of Arsenic(III)

2006; Springer Nature; Volume: 22; Issue: 4 Linguagem: Inglês

10.2116/analsci.22.567

1348-2246

Xuan Dai, Richard G. Compton,

Advanced biosensing and bioanalysis techniques

Gold nanoparticle modified indium tin oxide (ITO) film coated glass electrodes were prepared for the first time through direct electrochemical deposition from 0.5 M H2SO4 containing 0.1 mM HAuCl4. The resulting electrode surfaces were characterized with AFM. Cyclic voltammetry and linear sweep voltammetry (LSV) of arsenic(III) on the modified electrodes were performed. After optimization, a LOD of 5 ± 0.2 ppb was obtained with 60 s deposition at −0.6 V (vs. SCE) in 1 M HNO3 using LSV.