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

journal contribution
posted on 2015-02-18, 00:00 authored by Alireza Foroushani, Yuanchao Zhang, Da Li, M Mathesh, H Wang, F Yan, Colin BarrowColin Barrow, J He, Wenrong YangWenrong Yang
We report a new method for ultrasensitive detection of Cu(2+), 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/Cu(2+)/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.

History

Journal

Chemical Communications

Volume

51

Issue

14

Pagination

2921 - 2924

Publisher

Royal Society of Chemistry

Location

Cambridge, Eng.

eISSN

1364-548X

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, Royal Society of Chemistry