Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen.

Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen. Research Abstract Details 

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Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen. Abstract Text:

Yuanfang Liu,Wei Chen,Alan G Joly,Yuqing Wang,Carey Pope,Yongbin Zhang,Jan-Olov Bovin,Peter Sherwood,

It is commonly believed that high-quality CdTe nanoparticles with strong luminescence can only be prepared under the protection of an inert gas such as nitrogen or argon. Here, we report the preparation of highly luminescent CdTe nanoparticles in air and compare their luminescence properties with CdTe nanoparticles made in nitrogen. We find that both water-soluble CdTe nanoparticles made in air and in nitrogen exhibit strong photoluminescence as well as upconversion luminescence at room temperature. However, differences do exist between the particles made in air and those made in nitrogen. In particular, the particles prepared in air display a faster growth rate, grow to larger sizes, and display stronger electron coupling relative to the particles prepared in nitrogen. X-ray photoelectron spectroscopy analysis indicates that the oxygen content in the nanoparticles synthesized in air is higher that that in particles synthesized in N(2), likely resulting in a higher availability of excess free cadmium. Cytotoxicity measurements reveal that the particles made in air appear slightly more toxic, possibly due to the excess of free cadmium.

Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen. Publishing Authors By Initials

Y Liu,W Chen,AG Joly,Y Wang,C Pope,Y Zhang,JO Bovin,P Sherwood,

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Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: The journal of physical chemistry. B

VOLUME: 110

Page Numbers: 16992-7000

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ISSN: 1520-6106

DAY: 31

MONTH: Aug

YEAR: 2006

Comparison of water-soluble CdTe nanoparticles synthesized in air and in nitrogen. Information

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LANGUAGE: eng

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AFFILIATION: Nomadics, Inc., 1024 South Innovation Way, Stillwater, Oklahoma 74074, USA.

Country: United States

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MEDLINETA: J Phys Chem B

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