35
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Enhanced Gas Sensing Properties of Spin-coated Na-doped ZnO Nanostructured Films

      research-article
      1 , 2 , a , 1 , 3
      Scientific Reports
      Nature Publishing Group

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          In this report, the structures, morphologies, optical, electrical and gas sensing properties of ZnO and ZnO: Na spin-coated films are studied. X-ray diffraction (XRD) results reveal that the films are of a single phase wurtzite ZnO with a preferential orientation along (002) direction parallel to c-axis. Na doping reduces the crystalline quality of the films. The plane surface of ZnO film turned to be wrinkle net-work structure after doping. The reflectance and the optical band gap of the ZnO film decreased after Na doping. The wrinkle net-work nanostructured Na-doped film shows an unusually sensitivity, 81.9% @ 50 sccm, for CO 2 gas at room temperature compared to 1.0% for the pure ZnO film. The signals to noise ratio (SNR) and detection limit of Na-doped ZnO sensor are 0.24 and 0.42 sccm, respectively. These enhanced sensing properties are ascribed to high surface-to-volume ratio, hoping effect, and the increase of O- vacancies density according to Kroger VinK effect. The response time increased from 179 to 240 s by the incorporation of Na atoms @50 sccm. This response time increased as the CO 2 concentration increased. The recovery time is increased from 122 to 472 s by the incorporation of Na atoms @50 sccm.

          Related collections

          Most cited references57

          • Record: found
          • Abstract: not found
          • Article: not found

          Fundamentals of zinc oxide as a semiconductor

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            ZnO – nanostructures, defects, and devices

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              Nomenclature in evaluation of analytical methods including detection and quantification capabilities (IUPAC Recommendations 1995)

                Bookmark

                Author and article information

                Journal
                Sci Rep
                Sci Rep
                Scientific Reports
                Nature Publishing Group
                2045-2322
                01 February 2017
                2017
                : 7
                : 41716
                Affiliations
                [1 ]Nanophotonics and Applications (NPA) Lab, Department of Physics, Faculty of Science, Beni- Suef University , Beni- Suef 62514, Egypt
                [2 ]Space Research Lab, Solar and Space Research Department, National Research Institute of Astronomy and Geophysics (NRIAG) , Helwan, Cairo, Egypt
                [3 ]Department of Physics, Faculty of Science, Fayoum University , Fayoum 63514, Egypt
                Author notes
                Article
                srep41716
                10.1038/srep41716
                5286451
                28145506
                fd8e8a67-eb32-4798-b99c-0a7b6346f8a5
                Copyright © 2017, The Author(s)

                This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

                History
                : 26 August 2016
                : 21 December 2016
                Categories
                Article

                Uncategorized
                Uncategorized

                Comments

                Comment on this article