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Plasmonics

, Volume 13, Issue 4, pp 1191–1199 | Cite as

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

  • Alwan M. Alwan
  • Ali A. Yousif
  • Layla A. Wali
Article

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.

Keywords

SERS Porous Si morphology Photoelectrochemical etching Ag nanoparticles Immersion process 

Notes

Acknowledgments

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

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Alwan M. Alwan
    • 1
  • Ali A. Yousif
    • 2
  • Layla A. Wali
    • 3
  1. 1.Department of Applied SciencesUniversity of TechnologyBaghdadIraq
  2. 2.College of Education, Al - Mustansiriyah UniversityBaghdadIraq
  3. 3.College of Basic Education, Al - Mustansiriyah UniversityBaghdadIraq

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