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- W2041017178 abstract "In this work, the important role of electronic changes taking place at the palladium (Pd)–graphene interface during hydrogen sensing has been established by studying hydrogen sensing behaviour of Pd and Pd/graphene composite layers with different Pd thicknesses. CVD-grown single layer graphene and Pd nanoparticulate layers deposited by thermal evaporation method were used in this study. A drastic change in hydrogen sensing behaviour was observed in Pd/graphene samples as the topography of Pd layer changes from a continuous film to a discontinuous nanoparticulate layer and finally to isolated Pd nanoparticles. In case of Pd nanoparticles/graphene samples having isolated nanoparticles, the observed sensing behaviour is due to change in electronic nature of Pd/graphene interface on hydrogen exposure. Relatively lower value of work function of Palladium hydride in comparison to graphene results in electron migration and compensation of p-type charge carriers in graphene on hydrogenation of Pd. The hole doping at Pd–G interface is also confirmed by Raman spectroscopy. The Pd/graphene interface sensor with 10 nm of Pd thickness shows enhanced sensing response (at 2% hydrogen) of 51.4% with faster response time (6 s) in comparison to sensing response (41%) and response time (56 s) in Pd thin film sensor having similar thickness." @default.
- W2041017178 created "2016-06-24" @default.
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- W2041017178 date "2015-03-01" @default.
- W2041017178 modified "2023-09-30" @default.
- W2041017178 title "Interface induced hydrogen sensing in Pd nanoparticle/graphene composite layers" @default.
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- W2041017178 doi "https://doi.org/10.1016/j.snb.2014.12.037" @default.
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