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Electroanalysis using macro-, micro-, and nanochemical architectures on electrode surfaces. Bulk surface modification of glassy carbon microspheres with gold nanoparticles and their electrical wiring using carbon nanotubes.
Anal Chem. 2006 Sep 01; 78(17):6102-8.AC

Abstract

Gold nanoparticles (approximately 30-60 nm in diameter) were deposited onto the surface of glassy carbon microspheres (10-20 microm) through electroless plating to produce bulk (i.e., gram) quantities of nanoparticle surface-modified microspheres. The gold nanoparticle-modified powder was then characterized by means of scanning electron microscopy and cyclic voltammetry. The voltammetric response of a macroelectrode consisting of a film of gold nanoparticle-modified glassy carbon microspheres, bound together and "wired-up" using multiwalled carbon nanotubes (MWCNTs), was investigated. We demonstrate that by intelligently exploiting both nano- and microchemical architectures and wiring up the electroactive centers using MWCNTs in this way, we can obtain macroelectrode voltammetric behavior while only using approximately 1% by mass of the expensive gold material that would be required to construct the equivalent gold film macrodisk electrode. The potential utility of electrodes constructed using chemical architectures such as this was demonstrated by applying them to the analytical determination of arsenic(III) concentration. An optimized limit of detection of 2.5 ppb was obtained.

Authors+Show Affiliations

Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16944890

Citation

Dai, Xuan, et al. "Electroanalysis Using Macro-, Micro-, and Nanochemical Architectures On Electrode Surfaces. Bulk Surface Modification of Glassy Carbon Microspheres With Gold Nanoparticles and Their Electrical Wiring Using Carbon Nanotubes." Analytical Chemistry, vol. 78, no. 17, 2006, pp. 6102-8.
Dai X, Wildgoose GG, Salter C, et al. Electroanalysis using macro-, micro-, and nanochemical architectures on electrode surfaces. Bulk surface modification of glassy carbon microspheres with gold nanoparticles and their electrical wiring using carbon nanotubes. Anal Chem. 2006;78(17):6102-8.
Dai, X., Wildgoose, G. G., Salter, C., Crossley, A., & Compton, R. G. (2006). Electroanalysis using macro-, micro-, and nanochemical architectures on electrode surfaces. Bulk surface modification of glassy carbon microspheres with gold nanoparticles and their electrical wiring using carbon nanotubes. Analytical Chemistry, 78(17), 6102-8.
Dai X, et al. Electroanalysis Using Macro-, Micro-, and Nanochemical Architectures On Electrode Surfaces. Bulk Surface Modification of Glassy Carbon Microspheres With Gold Nanoparticles and Their Electrical Wiring Using Carbon Nanotubes. Anal Chem. 2006 Sep 1;78(17):6102-8. PubMed PMID: 16944890.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electroanalysis using macro-, micro-, and nanochemical architectures on electrode surfaces. Bulk surface modification of glassy carbon microspheres with gold nanoparticles and their electrical wiring using carbon nanotubes. AU - Dai,Xuan, AU - Wildgoose,Gregory G, AU - Salter,Chris, AU - Crossley,Alison, AU - Compton,Richard G, PY - 2006/9/2/pubmed PY - 2007/4/20/medline PY - 2006/9/2/entrez SP - 6102 EP - 8 JF - Analytical chemistry JO - Anal Chem VL - 78 IS - 17 N2 - Gold nanoparticles (approximately 30-60 nm in diameter) were deposited onto the surface of glassy carbon microspheres (10-20 microm) through electroless plating to produce bulk (i.e., gram) quantities of nanoparticle surface-modified microspheres. The gold nanoparticle-modified powder was then characterized by means of scanning electron microscopy and cyclic voltammetry. The voltammetric response of a macroelectrode consisting of a film of gold nanoparticle-modified glassy carbon microspheres, bound together and "wired-up" using multiwalled carbon nanotubes (MWCNTs), was investigated. We demonstrate that by intelligently exploiting both nano- and microchemical architectures and wiring up the electroactive centers using MWCNTs in this way, we can obtain macroelectrode voltammetric behavior while only using approximately 1% by mass of the expensive gold material that would be required to construct the equivalent gold film macrodisk electrode. The potential utility of electrodes constructed using chemical architectures such as this was demonstrated by applying them to the analytical determination of arsenic(III) concentration. An optimized limit of detection of 2.5 ppb was obtained. SN - 0003-2700 UR - https://www.unboundmedicine.com/medline/citation/16944890/Electroanalysis_using_macro__micro__and_nanochemical_architectures_on_electrode_surfaces__Bulk_surface_modification_of_glassy_carbon_microspheres_with_gold_nanoparticles_and_their_electrical_wiring_using_carbon_nanotubes_ L2 - https://doi.org/10.1021/ac060582o DB - PRIME DP - Unbound Medicine ER -