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Synthesis of ZnxMg1-xO Nanocrystals and the Assessment of their Antimicrobial Activity against Escherichia Coli

Published online by Cambridge University Press:  14 October 2014

Yarilyn Cedeño-Mattei ,
Rosa Concepción-Abreu  and
Oscar Perales-Pérez
Yarilyn Cedeño-Mattei
Affiliation:
Department of Engineering Science and Materials, University of Puerto Rico, Mayaguez, PR 00681-9000, U.S.A. Department of Chemistry, University of Puerto Rico, Mayaguez, PR 00681-9000, U.S.A.
Rosa Concepción-Abreu
Affiliation:
Department of Biology, Chemistry, and Environmental Sciences, Interamerican University of Puerto Rico, San Germán, PR 00683, U.S.A.
Oscar Perales-Pérez
Affiliation:
Department of Engineering Science and Materials, University of Puerto Rico, Mayaguez, PR 00681-9000, U.S.A. Department of Chemistry, University of Puerto Rico, Mayaguez, PR 00681-9000, U.S.A.
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Abstract

The present work focuses on the synthesis and evaluation of the antimicrobial activity of ZnxMg1-xO solid solutions. ZnxMg1-xO solid solutions were synthesized through the thermal decomposition of ZnMg-precursor synthesized in aqueous and ethanol solutions via a two-steps process. The antimicrobial activity of ZnxMg1-xO solid solution against E. coli was evaluated using the spread plate method in presence of ZnxMg1-xO powder of different contents of Zn species, ‘x’. The powder concentrations evaluated were 500, 1000, and 1500 ppm. Zn0.10Mg0.90O powders exhibited a bacterial growth inhibition between 38% and 100% when the powder concentration increased from 500 up to 1500 ppm, respectively. A decreasing trend was observed for x = 0.30 and above; the corresponding bacterial growth inhibition was 12%, 6%, and 5% when the particles concentration was, respectively, 500, 1000, and 1500 ppm. X-Ray diffraction analyses suggested the incorporation of Zn ions into the MgO lattice for ‘x’ values below 0.10, enhancing the antimicrobial activity; the formation of two isolated oxide phases observed at larger ‘x’ values (e.g. x = 0.30 and x = 0.50 Zn), could explain the detected inhibition of the corresponding antimicrobial activity.

Keywords

crystal growthnanoscaleoxide
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1675: Symposium K/RR – Synthesis, Characterization and Applications of Functional Materials—Thin Films and Nanostructures , 2014 , pp. 79 - 84
Copyright
Copyright © Materials Research Society 2014 

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References

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