Copper nanoparticles synthesized by thermal decomposition in liquid phase: the influence of capping ligands on the synthesis and bactericidal activity

Fernando B. Effenberger, Marcos Alejandro Sulca Lopez, M. Teresa Machini, Ricardo A. Couto, Pedro K. Kiyohara, Giovanna Machado, Liane M. Rossi

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

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.

Original languageEnglish
Article number2588
JournalJournal of Nanoparticle Research
Volume16
Issue number11
DOIs
StatePublished - Nov 2014
Externally publishedYes

Bibliographical note

Funding Information:
Acknowledgments The authors are grateful to the Brazilian agencies FAPESP and CNPq for financial support. We also thank Prof. Ana Maria Ferreira (Instituto de Química, Universidade de São Paulo) for TG-MS measurements (FAPESP Grant 05/60596-8). MTM and LMR are members of the NAPCatSinQ-USP.

Publisher Copyright:
© 2014, Springer Science+Business Media Dordrecht.

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

  • Bactericidal effect
  • Composite nanoparticle
  • Copper
  • Nanoparticles
  • Oleic acid
  • Oleylamine
  • Thermal decomposition

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