Abstract
Core-shell nanoparticles are emerging advanced materials for developing novel electroanalytical platforms. This paper describes the results of an investigation of the electroactivity of Cu2+ ions on electrodes coated with thin films assembled from thiolate-encapsulated gold nanoparticles of 2 nm core size (Au2-nm) and a carboxylic functionalized alkyl thiol linker, i.e. 11-mercaptoundecanoic acid (MUA). The high surface-to-volume ratio and the 3-D ligand network properties are potentially useful as sensitive and selective nanomaterials for the monitoring and removal of environmental heavy metals. The nanostructured MUA-Au2-nm film is sensitive to Cu2+ below 1 ppm. The selectivity of the electroactivity is also probed using mixed-metal systems such as Cu2+ and Fe3+ and Cu2+ and Zn2+. Issues related to the electrochemical activity of these metal ions are also discussed.
Original language | English (US) |
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Pages (from-to) | 69-76 |
Number of pages | 8 |
Journal | Journal of Electroanalytical Chemistry |
Volume | 517 |
Issue number | 1-2 |
DOIs | |
State | Published - Dec 28 2001 |
Externally published | Yes |
Keywords
- Carboxylic acid
- Copper ion
- Electrochemistry
- Gold nanoparticles
- Heavy metal
- Nanostructured thin film assembly
ASJC Scopus subject areas
- Analytical Chemistry
- General Chemical Engineering
- Electrochemistry