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Fluorescence From Metallic Silver and Iron Nanoparticles Prepared by Exploding Wire Technique

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Abstract

The observation of intense visible fluorescence from silver and iron nanoparticles in different solution phases and surface capping is reported here. Metallic silver and iron nanoparticles were obtained by exploding pure silver and iron wires in double distilled water. The adsorption of bovine serum albumin protein on the silver nanoparticles showed enhanced fluorescence. The presence of polyvinyl pyrrolidone polymer in the exploding medium resulted in a stabilized growth of iron nanoparticles with enhanced fluorescence intensity. The fluorescence was found to be surface/interface-dependant and is attributed to electronic transitions among characteristic interface energy bands. The magnetic nature of iron nanoparticles was confirmed from the hysteresis measurements.

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Acknowledgments

We would like to acknowledge Dr. N. C. Mehra and Mr. Raman of the University Science Instrumentation Center and Mr. P. C. Padmakshan of the Geology Department, University of Delhi, for recording TEM, UV-visible, and x-ray diffraction data, respectively, and Prof. K. Muralidhar and Mr. Vineet Sharma, of the Department of Zoology, University of Delhi, for their help in carrying out the BSA adsorption experiments and their helpful discussions. We also thank Dr. N. K. Chaudhary of the Institute for Nuclear Medicines and Allied Sciences, Delhi, for recording the fluorescence spectra and Dr. R. K. Kotnala of the National Physical Laboratory, Delhi, for carrying out the magnetization measurements. We would also like to acknowledge the Department of Science and Technology, India, for the funding throughout the project (SR/S5/NM-52/2002) from the Nanoscience and Technology Initiative program.

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

    Abdullah Alqudami & S. Annapoorni

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  1. Abdullah Alqudami
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  2. S. Annapoorni
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Correspondence to Abdullah Alqudami.

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Alqudami, A., Annapoorni, S. Fluorescence From Metallic Silver and Iron Nanoparticles Prepared by Exploding Wire Technique. Plasmonics 2, 5–13 (2007). https://doi.org/10.1007/s11468-006-9019-2

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