Journal
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 111, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.msec.2020.110765
Keywords
beta-Ag2MoO4; Antibacterial activity; Morphology evolution
Categories
Funding
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP-Centro de Desenvolvimento de Materiais Funcionais) [2013/07296-2]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2015/03654-7]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [304190/2013-6]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Generalitat Valenciana [PrometeoII/2014/022, ACOMP/2015/1202]
- Ministerio de Economia y Competitividad [CTQ2015-65207-P]
- Programa de Cooperacion Cientifica con Iberoamerica (Brasil) of Ministerio de Educacion [PHBP14-00020]
- Ministerio de Economia y Competitividad, Salvador Madariaga program [PRX15/00261]
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Crystal morphology with different surfaces is important for improving the antibacterial activity of materials. In this experimental and theoretical study, the antibacterial activity of beta-Ag2MoO4 microcrystals against the Gram-positive bacteria, namely, methicillin-resistant Staphylococcus aureus (MRSA), and the Gram-negative bacteria, namely, Escherichia coli (E. coli), was investigated. In this study, beta-Ag2MoO4 crystals with different morphologies were synthesized by a simple co-precipitation method using three different solvents. The antimicrobial efficacy of the obtained microcrystals against both bacteria increased according to the solvent used in the following order: water < ammonia < ethanol. Supported by experimental evidence, a correlation between morphology, surface energy, and antibacterial performance was established. By using the theoretical Wulff construction, which was obtained by means of density functional calculations, the morphologies with large exposition of the (001) surface exhibited superior antibacterial activity. This study provides a low cost route for synthesizing beta-Ag2MoO4 crystals and a guideline for enhancing the biological effect of biocides on pathogenic bacteria by the morphological modulation.
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