Tunnelling current recognition through core-satellite gold nanoparticles for ultrasensitive detection of copper ions
| Autor: | Fuhua Yan, Motilal Mathesh, Yuanchao Zhang, Alireza Dibaji Foroushani, Hongbin Wang, Colin J. Barrow, Jin He, Da Li, Wenrong Yang |
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| Rok vydání: | 2015 |
| Předmět: |
inorganic chemicals
Materials science Molecular junction chemistry.chemical_element Metal Nanoparticles Nanotechnology Catalysis Ion Limit of Detection Materials Chemistry Cysteine Quantum tunnelling Detection limit Range (particle radiation) Hydrogen bond Metals and Alloys Hydrogen Bonding General Chemistry Copper Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Colloidal gold Ceramics and Composites Gold |
| Zdroj: | Chemical communications (Cambridge, England). 51(14) |
| ISSN: | 1364-548X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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