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Synthesis of Blue Fluorescence CdS Quantum Dots Stabilized by L-cysteine in Aqueous Phase

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In this paper we report a novel synthesis method of blue fluorescence CdS quantum dots stabilized by L-cysteine in aqueous phase. When pH value of the core/shell CdTe/CdS colloid solution changed from 11.6 to 1.5, blue fluorescence CdS QDs was obtained. The fluorescence emission wavelength yielded a hypsochromic shift from 540 nm to 438 nm corresponding to the absorption peak position gave a hypsochromic shift from 518 nm to 352 nm. The CdS QDs were characterized by XPS and TEM. And the photostability of CdS QDs solution irradiated with UV lamp under open air condition at room temperature was very stable.
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Keywords: BLUE FLUORESCENCE; CDS; CDTE; L-CYSTEINE; QUANTUM DOTS

Document Type: Research Article

Publication date: 01 August 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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