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A Novel Intermediate-Sacrificed Route to Polycrystalline Nanorods Consisting of Highly Oriented Quantum Dots of Cubic CdS

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Polycrystalline nanorods of CdS were successfully prepared by a novel solvothermal method using simple initial materials of sulfur and Cd(Ac)2 ˙ 2H2O in pyridine at 160 °C. TEM, HRTEM and SAED analyses reveal that the polycrystalline nanorods with the lengths from 400 to 1000 nm and a mean diameter of ca 40 nm are assembled with highly oriented quantum dots of face-centered cubic CdS. The chemical reactions under the current solvothermal conditions involve the first reduction of sulfur by acetate anions to S2–, and subsequently the formation of intermediate complex CdS(Py)0.5 with nanorod-like morphology, as well as finally prolonged solvothermal process to the formation of the polycrystalline nanorods. Therefore, a new intermediate-sacrificed mechanism to direct the formation of cubic CdS polycrystalline nanorods was proposed.
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Document Type: Research Article

Publication date: 2008-06-01

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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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