Role of silver doping on the defects related photoluminescence and antibacterial behaviour of zinc oxide nanoparticles

Vinod Kumar, Jai Prakash, Jitendra Pal Singh, Keun Hwa Chae, C. Swart, O. M. Ntwaeaborwa, H. C. Swart, Viresh Dutta

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

The Ag doped ZnO (ZnO:Ag) NPs with a hexagonal wurtzite structure were synthesized by a solution combustion method. X-ray absorption near edge structure (XANES) and X-ray photoelectron spectroscopy (XPS) were used to study the defects, local electronic and atomic structures before and after Ag doping. XPS and XANES studies confirmed the deficiency of concentration of defects in ZnO after Ag doping. The photoluminescence study showed the deep level emission in the orange-red region in addition to the band to band emission. It was also found that the defect related emission of ZnO was decreased with an increasing in Ag concentration. The antibacterial behaviour of ZnO and ZnO:Ag NPs was studied against the gram positive and gram negative bacteria. The role of Ag doping and defects in the ZnO NPs were discussed for the observed antibacterial and photoluminescence behaviour.

Original languageEnglish
Pages (from-to)191-199
Number of pages9
JournalColloids and Surfaces B: Biointerfaces
Volume159
DOIs
Publication statusPublished - 1 Nov 2017
Externally publishedYes

Keywords

  • Antibacterial behaviour
  • Defects
  • Photoluminescence
  • XANES
  • XPS
  • ZnO:Ag nanoparticles

ASJC Scopus subject areas

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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