Stability of CdS quantum dots synthesized with the help of the bacterium Escherichia coli

TitleStability of CdS quantum dots synthesized with the help of the bacterium Escherichia coli
Publication TypeJournal Article
Year of Publication2014
AuthorsBorovaya, MN, Naumenko, AP, Yemets, AI, Blume, Ya.B
Abbreviated Key TitleDopov. Nac. akad. nauk Ukr.
DOI10.15407/dopovidi2014.07.145
Issue7
SectionBiochemistry
Pagination145-151
Date Published7/2014
LanguageUkrainian
Abstract

Semiconductor CdS nanoparticles are produced by the bacterium Escherichia coli. It is shown that their maximum luminescence peak is at 443 nm, which is typical of cadmium sulfide nanoparticles synthesized using microorganisms. The stability of the obtained quantum dots is investigated for the first time by spectral analysis. It is established that nanoparticles are aggregated. However, they retain the ability to luminescence for 10 days, 1 and 3 months after a sample preparation. By the method of transmission electron microscopy, it is demonstrated that quantum dots are approximately of a spherical shape, do not have surface defects, and have a diameter from 4 to 8 nm.

Keywordsbacterium Escherichia coli, CdS quantum dots, stability
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