Abstract
A new voltammetric method for a direct determination of gold nanoparticles, based on adsorption and electrochemical detection of colloidal gold, is described. In this protocol, the absorption of gold nanoparticles onto the rough surface of graphite-epoxy composite electrode is followed by their electrochemical oxidation in 0.1 M HCl medium at a potential of +1.25 V. The resulting tetrachloroaurate ions generated near the electrode surface are detected by differential pulse voltammetry (DPV). The DPV response is linear in the range from 4.7 × 108 to 4.7 × 1011 nanoparticles cm-3 with a limit of detection of 1.8 × 10 8 gold nanoparticles cm-3. The surface characteristics of the composite electrode are investigated and the parameters that affect the complete analytical detection process of gold nanoparticles are optimized.
| Original language | English |
|---|---|
| Pages (from-to) | 3702-3707 |
| Number of pages | 6 |
| Journal | Electrochimica Acta |
| Volume | 50 |
| Issue number | 18 |
| DOIs | |
| Publication status | Published - 2005 Jun 10 |
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All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Electrochemistry
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Direct voltammetric determination of gold nanoparticles using graphite-epoxy composite electrode. / Pumera, Martin; Aldavert, Marta; Mills, Chris; Merkoçi, Arben; Alegret, Salvador.
In: Electrochimica Acta, Vol. 50, No. 18, 10.06.2005, p. 3702-3707.Research output: Contribution to journal › Article
TY - JOUR
T1 - Direct voltammetric determination of gold nanoparticles using graphite-epoxy composite electrode
AU - Pumera, Martin
AU - Aldavert, Marta
AU - Mills, Chris
AU - Merkoçi, Arben
AU - Alegret, Salvador
PY - 2005/6/10
Y1 - 2005/6/10
N2 - A new voltammetric method for a direct determination of gold nanoparticles, based on adsorption and electrochemical detection of colloidal gold, is described. In this protocol, the absorption of gold nanoparticles onto the rough surface of graphite-epoxy composite electrode is followed by their electrochemical oxidation in 0.1 M HCl medium at a potential of +1.25 V. The resulting tetrachloroaurate ions generated near the electrode surface are detected by differential pulse voltammetry (DPV). The DPV response is linear in the range from 4.7 × 108 to 4.7 × 1011 nanoparticles cm-3 with a limit of detection of 1.8 × 10 8 gold nanoparticles cm-3. The surface characteristics of the composite electrode are investigated and the parameters that affect the complete analytical detection process of gold nanoparticles are optimized.
AB - A new voltammetric method for a direct determination of gold nanoparticles, based on adsorption and electrochemical detection of colloidal gold, is described. In this protocol, the absorption of gold nanoparticles onto the rough surface of graphite-epoxy composite electrode is followed by their electrochemical oxidation in 0.1 M HCl medium at a potential of +1.25 V. The resulting tetrachloroaurate ions generated near the electrode surface are detected by differential pulse voltammetry (DPV). The DPV response is linear in the range from 4.7 × 108 to 4.7 × 1011 nanoparticles cm-3 with a limit of detection of 1.8 × 10 8 gold nanoparticles cm-3. The surface characteristics of the composite electrode are investigated and the parameters that affect the complete analytical detection process of gold nanoparticles are optimized.
UR - http://www.scopus.com/inward/record.url?scp=19044394685&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=19044394685&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2005.01.035
DO - 10.1016/j.electacta.2005.01.035
M3 - Article
AN - SCOPUS:19044394685
VL - 50
SP - 3702
EP - 3707
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
IS - 18
ER -