Gamma–Radiation-Assisted Synthesis of Luminescent ZnO/Ag Heterostructure Core–Shell Nanocomposites

Alam Abedini, Mohammad Saraji, Ahmad Ashrif A Bakar, P. Susthitha Menon N V Visvanathan, Sahbudin Shaari

Research output: Contribution to journalArticle

Abstract

There is increasing interest in tuning the physical properties of semiconductor nanostructures using metal nanoparticles. In this work, ZnO nanosphere covered with Ag nanoparticles were synthesized using gamma–radiation-assisted method. The amount of deposited Ag nanoparticles is controlled by changing irradiation dose in the range of 30–100 kGy in order to tune the semiconductor–metal interaction. The successful deposition of Ag on the ZnO nanoparticles is examined by analyzing the morphology, microstructure, optical, and magnetic properties of ZnO/Ag nanoparticles through field emission scanning electron (FESEM), microscopy X-ray diffraction spectra, UV-visible absorption, photoluminescence measurement, and vibrating sample magnetometer. FESEM and elemental mapping results confirmed that Ag nanoparticles have been concentrated at the surface of spherical ZnO particles. Moreover, formation of pure metallic Ag nanoparticles has been confirmed by XRD analysis. UV-visible absorption spectra of obtained ZnO/Ag showed two combined peaks, a weak peak at the shoulder around 360 nm corresponds to ZnO and a sharp absorption at 420 nm refers to spherical Ag nanoparticles. Obtained results from photoluminescence revealed that the near-band-edge emission and defect-related visible emission bands of ZnO could be enhanced dramatically at the same time by deposition of Ag nanoparticles, which was ascribed to localized surface plasmon–exciton coupling and surface plasmon scattering. Controlling the semiconductor and metal coupling effect is interesting because of its application in highly efficient optoelectronic devices and biosensor.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalPlasmonics
DOIs
Publication statusAccepted/In press - 5 Apr 2017

Fingerprint

Nanocomposites
Nanoparticles
Heterojunctions
Metal Nanoparticles
Semiconductors
Photoluminescence
Nanospheres
Semiconductor materials
Nanostructures
Biosensing Techniques
Metal nanoparticles
X-Ray Diffraction
Electron Scanning Microscopy
Magnetometers
Biosensors
Field emission
Optoelectronic devices
Dosimetry
Metals
Absorption spectra

Keywords

  • Core/shell
  • Gamma–irradiation method
  • Luminescence behavior
  • Optical properties
  • ZnO/Ag nanoparticles

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biochemistry

Cite this

Gamma–Radiation-Assisted Synthesis of Luminescent ZnO/Ag Heterostructure Core–Shell Nanocomposites. / Abedini, Alam; Saraji, Mohammad; A Bakar, Ahmad Ashrif; N V Visvanathan, P. Susthitha Menon; Shaari, Sahbudin.

In: Plasmonics, 05.04.2017, p. 1-8.

Research output: Contribution to journalArticle

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