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Synthesis of high-quality near-infrared-emitting CdTeS alloyed quantum dots via the hydrothermal method

Mao, Weiyong and Guo, Jia and Yang, Wuli and Wang, Changchun and He, Jia and Chen, Jiyao (2007) Synthesis of high-quality near-infrared-emitting CdTeS alloyed quantum dots via the hydrothermal method. NANOTECHNOLOGY, 18 (48).

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Official URL: http://www.iop.org/EJ/abstract/0957-4484/18/48/485...

Abstract

We present a facile one-pot method to fabricate water-dispersed near-infrared-emitting (650-800 nm) CdTeS alloyed quantum dots with high photoluminescence quantum yields (PL QYs). Due to the hydrolysis of thiol ligands, the sulfur was incorporated into the CdTe nanocrystals, forming CdTeS alloyed QDs. The effects of the type of thiol ligands, ligand-to-Cd molar ratio, and precursor concentration on the QDs were investigated, and thus high-quality water-dispersed CdTeS alloyed QDs (PL QYs 68%) were prepared with a high efficiency via the hydrothermal method. Water-dispersed CdTeS alloyed QDs with excellent emissions in the near-IR spectrum window have great potential in biological and medical applications especially in in vivo imaging.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Technology > Manufacturing processes for nanotechnology
Biomedical Science > Nanomedicine
Physical Science > Photonics
ID Code:6330
Deposited By:IoN
Deposited On:09 Dec 2009 10:03
Last Modified:09 Dec 2009 10:03

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