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.
Volume 45, 2022
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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