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Effect of etching on the optical properties of partially iodized commercial silver foils

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Abstract

Commercial silver foils-typically 10 μ thick have surfaces contaminated by ambient air that limit optical reflectivity and chemical reactivity. To overcome this in order to realize surface enhanced raman scattering substrates and (bio)chemical and optical sensors it is mandatory to employ methods such as chemical etching and partial iodization by exposure to a flux of iodine vapors for durations less than 15 min. The latter operation not only modifies the surface microstructure of the Ag foil but also initiates iodization—which could be monitored through Ag surface plasmons and their gradual conversion to excitons.

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Acknowledgments

We would like to thanks Dr M. Ghanashyam Krishna for his interest in this work.

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Authors and Affiliations

  1. School of Physics, University of Hyderabad, Hyderabad, 500 046, Andhra Pradesh, India

    D. Rajesh & C. S. Sunandana

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  1. D. Rajesh
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  2. C. S. Sunandana
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Correspondence to C. S. Sunandana.

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Rajesh, D., Sunandana, C.S. Effect of etching on the optical properties of partially iodized commercial silver foils. Indian J Phys 86, 681–686 (2012). https://doi.org/10.1007/s12648-012-0122-2

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