Mechanism of Antibacterial Activity via Morphology Change of alpha-AgVO3: Theoretical and Experimental Insights

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de Oliveira, Regiane Cristina ; de Foggi, Camila Cristina ; Teixeira, Mayara Mondego ; Penha da Silva, Maya Dayana ; Assis, Marcelo ; Francisco, Eric Mark ; Alves da Silva Pimentel, Bruna Natalia ; dos Santos Pereira, Paula Fabiana ; Vergani, Carlos Eduardo ; Machado, Ana Lucia ; Andres, Juan ; Gracia, Lourdes ; Longo, Elson

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED MATERIALS & INTERFACES; v. 9, n. 13, p. 11472-11481, APR 5 2017.
• Citações Web of Science: 17

Resumo

The electronic configuration, morphology, optical features, and antibacterial activity of metastable alpha-AgVO3 crystals have been discussed by a conciliation and association of the results acquired by experimental procedures and first-principles calculations. The alpha-AgVO3 powders were synthesized using a coprecipitation method at 10, 20, and 30 degrees C. By using a Wulff construction for all relevant low-index surfaces {[}(100), (010), (001), (110), (011), (101), and (111)], the fine-tuning of the desired morphologies can be achieved by controlling the values of the surface energies, thereby lending a microscopic understanding to the experimental results. The as-synthesized alpha-AgVO3 crystals display a high antibacterial activity against methicillin-resistant Staphylococcus aureus. The results obtained from the experimental and theoretical techniques allow us to propose a mechanism for understanding the relationship between the morphological changes and antimicrobial performance of alpha-AgVO3. (AU)

• Processo FAPESP: 15/03654-7 - Ação antimicrobiana de óxidos bimetálicos e de revestimento depositado a plasma sobre resina acrílica
• Beneficiário: Camila Cristina de Foggi
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs