Electrochemical sensing using quantum-sized gold nanoparticles

S. Senthil Kumar, Kyuju Kwak, Dongil Lee

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

This paper describes the electrocatalytic activity of quantum-sized thiolate protected Au25 nanoparticles and their use in electrochemical sensing. The Au25 film modified electrode exhibited excellent mediated electrocatalytic activity that was utilized for amperometric sensing of biologically relevant analytes, namely, ascorbic acid and uric acid. The electron transfer dynamics in the Au25 film was examined as a function of Au25 concentration, which manifested the dual role of Au25 as an electronic conductor as well as a redox mediator. The electron transfer study has further revealed the correlation between the electronic conductivity of the Au25 film and the sensing sensitivity.

Original languageEnglish
Pages (from-to)3244-3247
Number of pages4
JournalAnalytical Chemistry
Volume83
Issue number9
DOIs
Publication statusPublished - 2011 May 1

Fingerprint

Gold
Nanoparticles
Electrons
Uric Acid
Ascorbic Acid
Electrodes
Oxidation-Reduction

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Cite this

Kumar, S. Senthil ; Kwak, Kyuju ; Lee, Dongil. / Electrochemical sensing using quantum-sized gold nanoparticles. In: Analytical Chemistry. 2011 ; Vol. 83, No. 9. pp. 3244-3247.
@article{cbc1f77b602143b694bb452d335b8d05,
title = "Electrochemical sensing using quantum-sized gold nanoparticles",
abstract = "This paper describes the electrocatalytic activity of quantum-sized thiolate protected Au25 nanoparticles and their use in electrochemical sensing. The Au25 film modified electrode exhibited excellent mediated electrocatalytic activity that was utilized for amperometric sensing of biologically relevant analytes, namely, ascorbic acid and uric acid. The electron transfer dynamics in the Au25 film was examined as a function of Au25 concentration, which manifested the dual role of Au25 as an electronic conductor as well as a redox mediator. The electron transfer study has further revealed the correlation between the electronic conductivity of the Au25 film and the sensing sensitivity.",
author = "Kumar, {S. Senthil} and Kyuju Kwak and Dongil Lee",
year = "2011",
month = "5",
day = "1",
doi = "10.1021/ac200384w",
language = "English",
volume = "83",
pages = "3244--3247",
journal = "Analytical Chemistry",
issn = "0003-2700",
publisher = "American Chemical Society",
number = "9",

}

Electrochemical sensing using quantum-sized gold nanoparticles. / Kumar, S. Senthil; Kwak, Kyuju; Lee, Dongil.

In: Analytical Chemistry, Vol. 83, No. 9, 01.05.2011, p. 3244-3247.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electrochemical sensing using quantum-sized gold nanoparticles

AU - Kumar, S. Senthil

AU - Kwak, Kyuju

AU - Lee, Dongil

PY - 2011/5/1

Y1 - 2011/5/1

N2 - This paper describes the electrocatalytic activity of quantum-sized thiolate protected Au25 nanoparticles and their use in electrochemical sensing. The Au25 film modified electrode exhibited excellent mediated electrocatalytic activity that was utilized for amperometric sensing of biologically relevant analytes, namely, ascorbic acid and uric acid. The electron transfer dynamics in the Au25 film was examined as a function of Au25 concentration, which manifested the dual role of Au25 as an electronic conductor as well as a redox mediator. The electron transfer study has further revealed the correlation between the electronic conductivity of the Au25 film and the sensing sensitivity.

AB - This paper describes the electrocatalytic activity of quantum-sized thiolate protected Au25 nanoparticles and their use in electrochemical sensing. The Au25 film modified electrode exhibited excellent mediated electrocatalytic activity that was utilized for amperometric sensing of biologically relevant analytes, namely, ascorbic acid and uric acid. The electron transfer dynamics in the Au25 film was examined as a function of Au25 concentration, which manifested the dual role of Au25 as an electronic conductor as well as a redox mediator. The electron transfer study has further revealed the correlation between the electronic conductivity of the Au25 film and the sensing sensitivity.

UR - http://www.scopus.com/inward/record.url?scp=79955553180&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79955553180&partnerID=8YFLogxK

U2 - 10.1021/ac200384w

DO - 10.1021/ac200384w

M3 - Article

VL - 83

SP - 3244

EP - 3247

JO - Analytical Chemistry

JF - Analytical Chemistry

SN - 0003-2700

IS - 9

ER -