Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559826 | Talanta | 2011 | 8 Pages |
Abstract
We here in report an extensive study on the development of a highly facile, selective and sensitive colorimetric probe for cysteine detection using silver nanoparticles (Ag NPs). The efficacy of the process relies upon the surface plasmon resonance properties of Ag NPs and the interaction of Ag-cysteine complex with chromium ions (Cr3+) in a ratio of 2:1. In the presence of Cr3+, cysteine was able to induce the aggregation of Ag NPs thereby resulting in a change in yellow colour of the Ag colloid to purple. The reported probe has a limit of detection down to 1Â nM which is to the best of our knowledge the lowest ever reported for the colorimetric detection of cysteine. Furthermore, a remarkable feature of this method is that it involves a simple technique exhibiting high selectivity to cysteine over other tested amino acids.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Aswathy Ravindran, Vinayak Mani, N. Chandrasekaran, Amitava Mukherjee,