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Ag–Au alloy nanoparticles prepared by electro-exploding wire technique

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Abstract

Homogenous Ag–Au alloy nanoparticles having an average size of 12 ± 2 nm were successfully prepared by the exploding wire technique comprising of a wire–plate system and using 12 V batteries. The X-ray photoelectron spectroscopy data reveal the formation of alloy nanoparticles with Ag80-Au20 composition, which agrees with the absorption data, obtained using UV-Visible spectroscopy. XPS also reveals a thin metal-oxide shell on the metallic alloy core. These alloy nanoparticles show visible fluorescence emission that was compared with the observed fluorescence from pure Ag nanoparticles. A mechanism for the observed fluorescence is also provided.

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Acknowledgements

We would like to acknowledge the Department of Science and Technology (DST), India for the funding through the project (SR/S5/NM-52/2002) from the Nanoscience and Technology Initiative programme.

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Authors and Affiliations

  1. Department of Physics and Astrophysics, University of Delhi, Delhi, 110 007, India

    Abdullah Alqudami & S. Annapoorni

  2. Surface Physics & Nanostructures Group, National Physical Laboratory, Dr. K S Krishnan Road, New Delhi, 110 012, India

    Govind & S. M. Shivaprasad

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  1. Abdullah Alqudami
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  2. S. Annapoorni
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  4. S. M. Shivaprasad
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Correspondence to Abdullah Alqudami.

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Alqudami, A., Annapoorni, S., Govind et al. Ag–Au alloy nanoparticles prepared by electro-exploding wire technique. J Nanopart Res 10, 1027–1036 (2008). https://doi.org/10.1007/s11051-007-9333-4

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