Sengar, Saurabh K. and Mehta, B. R. and Govind, - (2014) Size and alloying induced shift in core and valence bands of Pd-Ag and Pd-Cu nanoparticles. Journal of Applied Physics, 115 (12). ISSN 0021-8979

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In this report, X-ray photoelectron spectroscopy studies have been carried out on Pd, Ag, Cu, Pd-Ag, and Pd-Cu nanoparticles having identical sizes corresponding to mobility equivalent diameters of 60, 40, and 20 nm. The nanoparticles were prepared by the gas phase synthesis method. The effect of size on valence and core levels in metal and alloy nanoparticles has been studied by comparing the values to those with the 60 nm nanoparticles. The effect of alloying has been investigated by comparing the valence and core level binding energies of Pd-Cu and Pd-Ag alloy nanoparticles with the corresponding values for Pd, Ag, and Cu nanoparticles of identical sizes. These effects have been explained in terms of size induced lattice contractions, alloying induced charge transfer, and hybridization effects. The observation of alloying and size induced binding energy shifts in bimetallic nanoparticles is important from the point of view of hydrogen reactivity.

Item Type: Article
Subjects: Physics
Depositing User: Dr. Rajpal Walke
Date Deposited: 05 Nov 2015 07:02
Last Modified: 05 Nov 2015 07:02

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