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A Study on the Morphology of the Silver Nanoparticles Deposited on the n-Type Porous Silicon Prepared Under Different Illumination Types

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Abstract

In this study, the influence of n-type porous Si (n-PS) morphology properties and the performance of Ag nanoparticles (AgNPs)/n-PS Raman substrate were investigated. Two kinds of n-PS morphology (macro n-PS and mud n-PS) structures were fabricated by laser-assisted etching (LAE) process and ordinary light-assisted etching (OLAE) process, respectively. A simple and cost-effective immersion plating process of n-PS in 0.01 M concentration of AgNO3 for 16-min immersion time was used to synthesize AgNPs. The morphological properties of the deposited AgNPs on the macro n-PS layer showed that the deposition process is concentrated on the pore wall with a little density, while for mud n-PS, the AgNP layer is mainly composed of high-density uniformly distributed spherical particles located over the mud surface. Surface-enhanced Raman scattering (SERS) process of AgNPs/n-PS revealed strong dependence on the morphology and the density of AgNPs. Enhancement factor (EF) of Raman signal of AgNPs/mud n-PS substrate is three orders of magnitude higher than that of AgNPs/macro n-PS substrate of about 1.6 × 1011 and 8.2 × 108, respectively.

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Acknowledgments

Authors would like to express their gratitude to the Department of Applied Sciences/University of Technology for assistance with sample preparation.

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Authors and Affiliations

  1. Department of Applied Sciences, University of Technology, Baghdad, Iraq

    Alwan M. Alwan

  2. College of Education, Al - Mustansiriyah University, Baghdad, Iraq

    Ali A. Yousif

  3. College of Basic Education, Al - Mustansiriyah University, Baghdad, Iraq

    Layla A. Wali

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  1. Alwan M. Alwan
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  2. Ali A. Yousif
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  3. Layla A. Wali
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Correspondence to Layla A. Wali.

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Alwan, A.M., Yousif, A.A. & Wali, L.A. A Study on the Morphology of the Silver Nanoparticles Deposited on the n-Type Porous Silicon Prepared Under Different Illumination Types. Plasmonics 13, 1191–1199 (2018). https://doi.org/10.1007/s11468-017-0620-3

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  • DOI: https://doi.org/10.1007/s11468-017-0620-3

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