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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Shanmugaraj, Krishnamoorthy Ilanchelian, Malaichamy |
| Copyright Year | 2016 |
| Abstract | In this contribution, we have developed a simple, environmentally friendly fluorescent turn-off sensor for the detection of copper (Cu2+) ions in aqueous solution by using lysozyme stabilized gold nanoclusters (Lys-AuNCs) as a fluorescent probe. Since lysozyme acted as both a reducing and stabilizing agent, the use of other external reducing or stabilizing agents was averted in the preparation of Lys-AuNCs. High resolution transmission electron microscopy (HR-TEM) results revealed that Lys-AuNCs are mono-dispersed spherical particles with an average particle size of 2.5 ± 0.3 nm. Lys-AuNCs exhibit strong fluorescence and emit red photoluminescence under illumination with ultraviolet light. The emission intensity of Lys-AuNCs decreased linearly upon the addition of increasing concentrations of Cu2+ ions in a wide range of 0.40 × 10−7 mol dm−3 to 4.00 × 10−7 mol dm−3 and the corresponding linear plot had a correlation coefficient of 0.9976. The limit of detection for this method was calculated as 9.00 × 10−9 mol dm−3 (S/N = 3). Lys-AuNCs exhibit good selectivity towards the selective determination of Cu2+ ions even in the presence of 100-fold higher concentration of common interfering cations. To further evaluate the analytical performance of this sensing system, the concentrations of Cu2+ ions were determined in real water samples using tap water, drinking water and sea water. |
| Starting Page | 54518 |
| Ending Page | 54524 |
| Page Count | 7 |
| File Format | HTM / HTML PDF |
| ISSN | 20462069 |
| Volume Number | 6 |
| Issue Number | 59 |
| Journal | RSC Advances |
| DOI | 10.1039/c6ra08325k |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Transmission electron microscopy Photoluminescence Fluorescence Copper Ultraviolet Emission intensity Correlation and dependence Lysozyme |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Chemical Engineering |
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