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      https://www.ias.ac.in/article/fulltext/boms/044/0045

    • Keywords

       

      Washing; strain; gas sensor; hydrogen; palladium; nanoparticle.

    • Abstract

       

      Hydrogen sensor response of palladium (Pd) nanoparticles changes when the nanoparticles are washed with different solvents prior to device formation. This study presents the effect of washing Pd nanoparticles with distilled wateror ethanol on their hydrogen response. The change induced in the surface characteristics of the Pd nanoparticles after washing is analysed with the help of UV–Vis absorption spectroscopy and glancing angle X-ray diffraction (GAXRD)studies. The nature of strain in nanoparticles after washing is particularly analysed from GAXRD data to understand the hydrogen response mechanism. The performance of the nanoparticle-based devices in humid ambient was also studied and the results were correlated to the consequence of sample washing. A suitable sensing mechanism within the purview of Langmuir model is discussed to understand the role of washing of the palladium nanoparticle yield.

    • Author Affiliations

       

      POOJA BHARDWAJ1 PARTHA BIR BARMAN1 SURAJIT KUMAR HAZRA1

      1. Department of Physics and Materials Science, Jaypee University of Information Technology, Waknaghat, Solan 173234, India
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