Assembling gold nanorods on a poly-cysteine modified glassy carbon electrode strongly enhance the electrochemical reponse to tetrabromobisphenol A
| Autor: | Chunya Li, Yina Huang, Guishen Liu, Yanying Wang, Xiaodong Hou, Kangbing Wu |
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| Rok vydání: | 2015 |
| Předmět: |
Detection limit
Materials science 010401 analytical chemistry Analytical chemistry 02 engineering and technology Square wave 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Analytical Chemistry Dielectric spectroscopy chemistry.chemical_compound chemistry Electrode Tetrabromobisphenol A Nanorod Cyclic voltammetry 0210 nano-technology Nuclear chemistry |
| Zdroj: | Microchimica Acta. 183:689-696 |
| ISSN: | 1436-5073 0026-3672 |
| Popis: | Cysteine (Cys) was electrochemically deposited on a glassy carbon electrode (GCE) by cyclic voltammetry. The poly-Cys modified electrode was placed in a solution of gold nanorods (GNRs) to induced self-assembly of the GNRs. The GNRs/poly-Cys/GCEs were characterized by scanning electron microscopy and electrochemical impedance spectroscopy. A voltammetric study on tetrabromobisphenol A (TBBPA) with this GCE showed the current response to be enhanced by a factor of 11 compared to a non-modified GCE. Based on these findings, a square wave voltammetric assay was worked out. Under optimized conditions, a linear relationship between the oxidation peak current and TBBPA is found for the 10 nM to 10 μM concentration range. The detection limit is 3.2 nM (at an S/N ratio of 3). The electrode was successfully applied to the determination of TBBPA in spiked tap water and lake water samples. |
| Databáze: | OpenAIRE |
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