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One-Pot Synthesis of Highly Luminescent CdTe Quantum Dots by Microwave Irradiation Reduction and Their Hg2+-Sensitive Properties

Duan, Junling and Song, Lianxiang and Zhan, Jinhua (2008) One-Pot Synthesis of Highly Luminescent CdTe Quantum Dots by Microwave Irradiation Reduction and Their Hg2+-Sensitive Properties. Nano Research, 2 (1). pp. 61-68.

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Official URL: http://www.springerlink.com/content/g463720r17g8p2...

Abstract

A facile one-pot microwave irradiation reduction route has been developed for the synthesis of highly luminescent CdTe quantum dots using Na2TeO3 as the Te source in an aqueous environment. The synthesis parameters of this simple and rapid approach, including the reaction temperature and time, the pH of the reaction solution and the molar ratio of the 3-mercaptopropionic acid (MPA) stabilizer to Cd2+, have considerable infl uence on the particle size and photoluminescence quantum yield of the CdTe quantum dots. The photoluminescence quantum yield of CdTe quantum dots prepared using relatively short reaction times (10 40 min) reached 40% 60% (emission peaks at 550 640 nm). Furthermore, the resulting products could be used as fl uorescent probes to detect Hg2+ ions in aqueous media. The response was linearly proportional to the concentration of Hg2+ ion in the range 8.0×10 9 mol/L to 2.0×10 6 mol/L with a detection limit of 2.7×10 9 mol/L.

Item Type:Article
Uncontrolled Keywords:CdTe, quantum dots, microwave irradiation, fl uorescent, sensor, mercury
Subjects:Physical Science > Quantum phenomena
Material Science > Nanochemistry
ID Code:3392
Deposited By:Lesley Tobin
Deposited On:16 Jan 2009 14:57
Last Modified:11 Aug 2009 16:31

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