Copper nanoparticles synthesized by thermal decomposition in liquid phase: the influence of capping ligands on the synthesis and bactericidal activity
| Autor: | Fernando Bacci Effenberger, Marcos A. Sulca, Pedro Kunihiko Kiyohara, M. Teresa Machini, Ricardo Alexandre Alves de Couto, Giovanna Machado, Liane M. Rossi |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Thermal decomposition Inorganic chemistry Diphenyl ether Nanoparticle chemistry.chemical_element Bioengineering General Chemistry Condensed Matter Physics Copper Atomic and Molecular Physics and Optics QUÍMICA ANALÍTICA Solvent Metal Oleic acid chemistry.chemical_compound chemistry Oleylamine Modeling and Simulation visual_art visual_art.visual_art_medium General Materials Science Nuclear chemistry |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1572-896X 1388-0764 |
| Popis: | We explored here the synthesis of copper nanoparticles (CuNPs) by thermal decomposition of copper(II) acetate in diphenyl ether in the presence of different capping ligands. To look for any specific role in thermal decomposition, we performed reactions in the presence of oleic acid, oleylamine, and 1,2-octanediol, or in the presence of different combinations of these capping ligands, or in the absence of them. The CuNPs obtained in the presence of oleic acid and oleylamine (in the presence or absence of 1,2-octanediol) were stabilized as Cu(0) NPs, and the “naked” NPs prepared in solvent only easily oxidized to CuO. Therefore, both oleic acid and oleylamine can act as capping ligands to prepare air-stable Cu(0) NPs. The 1,2-alkyldiol is not necessary for metal reduction during the synthesis, but its presence improves size and morphology control. The presence of capping ligands significantly reduced the bactericidal activity exhibited by the Cu NPs against the gram-negative bacteria Escherichia coli. |
| Databáze: | OpenAIRE |
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