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Effect of Cadmium Source on the Structure and Optical Properties of CdTe Quantum Dots

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Herein, we report the growth of CdTe quantum dots capped with 3-mercaptopropionic acid prepared by different cadmium sources. Different cadmium sources and potassium tellurite were used to prepare the cadmium telluride in aqueous media and in presence of 3-mercaptopropoionic acid, at low temperature. The effect of cadmium source on the microstructure, crystallization phase, melting point, optical properties are investigated. The obtained results showed that there is a significant effect of varying the cadmium source on the atomic percentage ratio of Te/Cd, size, and crystalline phase of prepared CdTe quantum dots. Moreover, using different cadmium sources lead to an important effect on the optical properties of the quantum dots including, absorption coefficient, band gap, emission intensity, full width at half maximum, and stokes shift.
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Keywords: 3-Mercaptopropionic Acid; Cadmium Telluride; Quantum Dots; Structural and Optical Properties

Document Type: Research Article

Affiliations: Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

Publication date: November 1, 2018

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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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