fulltext.study @t Gmail

Facile production of ZnS quantum dot nanoparticles by Saccharomyces cerevisiae MTCC 2918

Paper ID Volume ID Publish Year Pages File Format Full-Text
23268 43426 2014 6 PDF Available
Title
Facile production of ZnS quantum dot nanoparticles by Saccharomyces cerevisiae MTCC 2918
Abstract

•This is a first report on the biosynthesis of ZnS nanoparticle by a yeast sp.•ZnS nanoparticles were produced in the quantum regime (30–40 nm).•ZnS nanoparticles were produced within 24 h.•The nanoparticles were extracted by a simple freeze–thaw procedure.

Microbial synthesis of nanoparticles is a green route towards ecofriendly measures to overcome the toxicity and non-applicability of nanomaterials in clinical uses obtained by conventional physical and chemical approaches. Nanoparticles in the quantum regime have remarkable characteristics with excellent applicability in bioimaging. Yeasts have been commercially exploited for several industrial applications. ZnS nanoparticles as semiconductor quantum dots have mostly been synthesized by bacterial species. Here in, we have attempted to produce ZnS nanoparticles in quantum regime by Saccharomyces cerevisiae MTCC 2918 fungus and characterize its size and spectroscopic properties. Intracellular ZnS nanoparticles were produced by a facile procedure and freeze thaw extraction using 1 mM zinc sulfate. The ZnS nanoparticles showed surface plasmon resonance band at 302.57 nm. The ZnS nanoparticles were in low yield and in the size range of 30–40 nm. Powder XRD analysis revealed that the nanoparticles were in the sphalerite phase. Photoluminescence spectra excited at 280 nm and 325 nm revealed quantum confinement effects. This suggests that yeasts have inherent sulfate metabolizing systems and are capable fungal sources to assimilate sulfate. Further insights are required to identify the transport/reducing processes that may have caused the synthesis of ZnS nanoparticles such as an oxidoreductase enzyme-mediated mechanism.

Keywords
Quantum dots; Saccharomyces cerevisiae; XRD analysis; ZnS nanoparticle
First Page Preview
Facile production of ZnS quantum dot nanoparticles by Saccharomyces cerevisiae MTCC 2918
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 170, 20 January 2014, Pages 73–78
Authors
, ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us