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Journal of Materials Science

, Volume 54, Issue 8, pp 6515–6529 | Cite as

Structural and optical characteristics, and bacterial decolonization studies on non-reactive RF sputtered Cu–ZnO@ graphene based nanoparticles thin films

  • Asim Jilani
  • Mohd Hafiz Dzarfan OthmanEmail author
  • Mohammad Omaish AnsariEmail author
  • Mohammad Oves
  • Syed Zajif Hussain
  • Imran Ullah Khan
  • M. Sh. Abdel-wahab
Energy materials
  • 63 Downloads

Abstract

Graphene oxide (GO) belongs to carbon family with honeycomb structure having hydroxide, carbonyl, and carboxylic moieties at its basal plane. These functionalities are decreased in reduced graphene oxide (rGO), and this boosts the intrinsic properties of GO. Herein, in this work, the effect on physical and chemical properties of GO and rGO in combination with copper-doped zinc oxide (Cu–ZnO) thin films, prepared via DC/RF sputtering, was investigated for the very first time. The deposition of Cu–ZnO over rGO (Cu–ZnO@rGO) showed remarkably superior properties and presented an extension in d-spacing without preferred plane orientation of Cu–ZnO plane, and this was found to be due to its hydrophobic nature. The decrease in band gap of composite thin films was due to the surface electric charge conducted by GO or rGO. The enhanced dielectric constant is attributed due to increase in electron–hole pairs owing to the increase in sp2 hybridization. However, sp2 network was also found to be responsible to provide the conductivity path way which increases the dielectric loss in Cu–ZnO@rGO thin films as compared to that in Cu–ZnO@GO; this might be due to aggregation of Cu–ZnO nanoparticles over the rGO films in comparison with GO as evident from the morphological analysis by AFM. The change in surface chemistry was ascribed with the ratio of COOH, C=O, C–OH and C–C bonding in the Cu–ZnO@GO and Cu–ZnO@rGO thin films as unveiled in their XPS analysis. The developed thin films exhibited enhanced antimicrobial activity against E. coli and E. faecalis which might be due to the synergistic effects of Cu–ZnO with GO or rGO.

Notes

Acknowledgements

The authors gratefully acknowledge the financial support from the Ministry of Higher Education Malaysia under the Higher Institution Centre of Excellence Scheme (Project No.: R.J090301.7846.4J201) and Universiti Teknologi Malaysia under Tier 1 Research University Grant (Project No.: Q.J130000.2546.16H40). The authors would also like to thank Research Management Centre, Universiti Teknologi Malaysia for the technical support.

Compliance with ethical standards

Conflict of interest

There is no conflict of interest to declare.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Advanced Membrane Technology Research CentreUniversiti Teknologi MalaysiaJohor BahruMalaysia
  2. 2.Center of NanotechnologyKing Abdul-Aziz UniversityJeddahSaudi Arabia
  3. 3.Faculty of Chemical and Energy EngineeringUniversiti Teknologi MalaysiaJohor BahruMalaysia
  4. 4.School of Chemical EngineeringYeungnam UniversityGyeongsan-siSouth Korea
  5. 5.Center of Excellence in Environmental StudiesKing Abdul-Aziz UniversityJeddahSaudi Arabia
  6. 6.Department of Chemistry and Chemical Engineering, SBA School of Science and Engineering (SBASSE)Lahore University of Management Sciences (LUMS)LahorePakistan
  7. 7.Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced SciencesBeni-Suef UniversityBeni-SuefEgypt

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