Synthesis of highly fluorescent glutathione-capped Zn(x)Hg(1-x)Se quantum dot and its application for sensing copper ion
| Autor: | Yi-Ming Chen, Wei-Lung Tseng, Fang-Chen Liu, Jia-Hui Lin |
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| Rok vydání: | 2009 |
| Předmět: |
Aqueous solution
Chemistry Analytical chemistry Quantum yield chemistry.chemical_element Fluorescence Copper Glutathione Mass Spectrometry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Colloid and Surface Chemistry Transition metal X-Ray Diffraction Quantum dot X-ray crystallography Quantum Dots Reactivity (chemistry) Spectrophotometry Ultraviolet Selenium Compounds Nuclear chemistry |
| Zdroj: | Journal of colloid and interface science. 337(2) |
| ISSN: | 1095-7103 |
| Popis: | A one-step synthesis of glutathione-capped Zn x Hg 1− x Se quantum dots (QDs) has been accomplished by reacting a mixture of Zn(ClO 4 ) 2 and Hg(ClO 4 ) 2 with NaHSe and using glutathione as surface-stabilizing agent. The fluorescent color of the alloyed QDs could be tuned by varying the Zn 2+ :Hg 2+ molar ratio, reaction pH, intrinsic Zn 2+ and Hg 2+ reactivity toward NaHSe, and the concentration of NaHSe. The size, composition, and inner structures of these QDs are characterized using dynamic light scattering, inductively coupled plasma-mass spectrometry, and X-ray powder diffraction. By varying the molar ratio of Zn 2+ to Hg 2+ in the precursor solution, the Zn x Hg 1− x Se QDs exhibited a tunable PL wavelength in the range of 548–621 nm. These QDs offered advantages of short reaction time (1 h), low reaction temperature (95 °C), high quantum yield, water solubility and biocompatibility. Additionally, glutathione-capped Zn 0.96 Hg 0.04 Se QDs (quantum yield = 78%) have been applied for sensing Cu 2+ . |
| Databáze: | OpenAIRE |
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