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Surface Modified Zinc Oxide Nanoparticles as Smart UV Sensors

  • Deepu Thomas
  • Jithin Prakash
  • Kishor Kumar SadasivuniEmail author
  • Kalim Deshmukh
  • Augustine J. Edakkara
Article
  • 12 Downloads

Abstract

The present paper examines the synthesis of ZnO nanoparticles and their surface modification via the microwave assisted sonochemical method along with its successful application in designing a smart UV sensor. The structure of the prepared samples was investigated using XRD, XPS and its respective crystallinity studies. The photoluminescence spectroscopy identified an increase in the green emission intensity due to surface modification which is attributed to the density of oxygen vacancies. The variation in the dielectric constant and dielectric loss values with surface modification is clearly substantiated. As a case study, it was observed a smart UV sensor fabricated using this surface modified ZnO response and decay time that are 14 s and 16 s, respectively. Also, the possibility of surface modification in tuning the sensing responses has been investigated in detail.

Keywords

ZnO microwave assisted sonochemical method surface modification green emission 

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Notes

Acknowledgments

This publication was partially made possible by UREP Grant 23-116-2-041 from Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors.

Supplementary material

11664_2019_7260_MOESM1_ESM.docx (73 kb)
Supplementary material 1 (DOCX 89 kb)

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Deepu Thomas
    • 1
  • Jithin Prakash
    • 2
  • Kishor Kumar Sadasivuni
    • 3
    Email author
  • Kalim Deshmukh
    • 4
  • Augustine J. Edakkara
    • 5
  1. 1.Department of PhysicsNirmalagiri CollegeNirmalagiriIndia
  2. 2.Department of ChemistrySt. Thomas CollegePala, KottayamIndia
  3. 3.Center for Advanced MaterialsQatar UniversityDohaQatar
  4. 4.New Technologies - Research CenterUniversity of West BohemiaPlzeňCzech Republic
  5. 5.Department of PhysicsSt. Thomas CollegeKottayamIndia

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