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CdSe quantum dots decorated by mercaptosuccinic acid as fluorescence probe for Cu |
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| Authors: | Shutang Chen Qiuhua Zhang Qi Zhou Weihong Tan |
| Institution: | a Department of Chemistry, School of Science, Key Laboratory of Cluster Science of Ministry of Education, Beijing Institute of Technology, Beijing 100081, People's Republic of China b Department of Chemistry, Soochow University, Industrial Park, Suzhou 215123, People's Republic of China c Center for Research at the Bio/Nano Interface, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA |
| Abstract: | Water-soluble CdSe quantum dots (QDs) were synthesized using mercaptosuccinic acid (MSA) as a stabilizer. The growth process and characterization of CdSe quantum dots were determined by transmission electron microscopy (TEM), X-ray diffraction (XRD), photoluminescence (PL) spectroscopy, Ultraviolet-visible (UV-vis) spectroscopy, and Fourier transform infrared (FT-IR) spectroscopy. Results demonstrated the MSA-capped CdSe QDs were highly crystalline and possessed good optical properties. Further, the resulting products could be used as fluorescent probes to detect Cu2+ ions in physiological buffer solution. The response was linearly proportional to the concentration of Cu2+ ion in the range 2×10−8- 3.5×10−7 mol L−1 with a detection limit of 3.4 nmol L−1. |
| Keywords: | CdSe Quantum dots Probes Copper ions |
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