Tunnelling current recognition through core–satellite gold nanoparticles for ultrasensitive detection of copper ions. Issue 14 (14th January 2015)

• Record Type: Journal Article
• Authors: Foroushani, Alireza; Zhang, Yuanchao; Li, Da; Mathesh, Motilal; Wang, Hongbin; Yan, Fuhua; Barrow, Colin J.; He, Jin; Yang, Wenrong
• Is Part Of: Chemical communications. Volume 51:Issue 14(2015)
• Page Start: 2921
• Page End: 2924
• Publication Date: 2015-01-14
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c4cc09451d
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : 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. Abstract : 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.