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Biosynthesis of biocompatible cadmium telluride quantum dots using yeast cells

Bao, Haifeng and Hao, Na and Yang, Yunxia and Zhao, Dongyuan (2010) Biosynthesis of biocompatible cadmium telluride quantum dots using yeast cells. Nano Research, 3 (7). pp. 481-489.

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Official URL: http://www.springerlink.com/content/r2422328236061...

Abstract

We demonstrate a simple and efficient biosynthesis method to prepare easily harvested biocompatible cadmium telluride (CdTe) quantum dots (QDs) with tunable fluorescence emission using yeast cells. Ultraviolet-visible (UV-vis) spectroscopy, photoluminescence (PL) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM) confirm that the CdTe QDs are formed via an extracellular growth and subsequent endocytosis pathway and have size-tunable optical properties with fluorescence emission from 490 to 560 nm and a cubic zinc blende structure with good crystallinity. In particular, the CdTe QDs with uniform size (2-3.6 nm) are protein-capped, which makes them highly soluble in water, and in situ bio-imaging in yeast cells indicates that the biosynthesized QDs have good biocompatibility. This work provides an economic and environmentally friendly approach to synthesize highly fluorescent biocompatible CdTe QDs for bio-imaging and bio-labeling applications.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9427
Deposited By:JNCASR
Deposited On:27 Sep 2010 06:29
Last Modified:27 Sep 2010 06:29

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