Issue 14, 2015

Tunnelling current recognition through core–satellite gold nanoparticles for ultrasensitive detection of copper ions

Abstract

We report a new method for ultrasensitive detection of Cu2+, which is based on changes in the tunnelling recognition current across self-assembled core–satellite gold nanoparticles (GNPs) networks functionalised with amino acids (L-cysteine). The addition of copper ions induces the formation of GNP/L-cysteine/Cu2+/L-cysteine/GNP molecular junctions and generates a significant decrease in the resistance through the networks. The networks are ultrasensitive to over ten orders range of copper ion concentrations.

Graphical abstract: Tunnelling current recognition through core–satellite gold nanoparticles for ultrasensitive detection of copper ions

Supplementary files

Article information

Article type
Communication
Submitted
26 Nov 2014
Accepted
07 Jan 2015
First published
07 Jan 2015

Chem. Commun., 2015,51, 2921-2924

Tunnelling current recognition through core–satellite gold nanoparticles for ultrasensitive detection of copper ions

A. Foroushani, Y. Zhang, D. Li, M. Mathesh, H. Wang, F. Yan, C. J. Barrow, J. He and W. Yang, Chem. Commun., 2015, 51, 2921 DOI: 10.1039/C4CC09451D

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