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A Low-Cost Stable SERS Substrate Based on Modified Silicon Nanowires

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Abstract

In this paper, we report fabrication of a simple, stable, low-cost, and easy-to-fabricate substrate for surface enhanced Raman spectroscopy (SERS) applications. Silicon nanowires are one of the widely used nanostructures in different fields of nanotechnology. Through creating and varying the gap between nanowires and reducing their filling ratio and tapering, silicon nanowires are converted to applicable SERS substrates. Furthermore, the effects of annealing and post-KOH etching on these silver-coated silicon nanowire substrates are examined. It is shown that the applied processes remarkably enhance the captured Raman signal. For samples etched with KOH method, an optimized etching time at which the Raman signal reaches its maximum value is obtained as well. Finally, an ultra-high enhancement in the Raman signal is obtained.

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Authors and Affiliations

  1. Photonics Group, Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran

    Hadi Rouhbakhsh, Sohrab Ahmadi-kandjani & Habib Tajalli

  2. Iranian National Center for Laser Science and Technology, Tehran, Iran

    Hadi Rouhbakhsh & Nahid Farkhari

  3. Clinical Biochemistry Department, Faculty of Medicine, Shahid Beheshti University of Medical Science, Tehran, Iran

    Saeed Karima

  4. Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Science, Tabriz, Iran

    Mohammad Rashidi

Authors
  1. Hadi Rouhbakhsh
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  2. Nahid Farkhari
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  3. Sohrab Ahmadi-kandjani
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  5. Habib Tajalli
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  6. Mohammad Rashidi
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Correspondence to Hadi Rouhbakhsh.

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Rouhbakhsh, H., Farkhari, N., Ahmadi-kandjani, S. et al. A Low-Cost Stable SERS Substrate Based on Modified Silicon Nanowires. Plasmonics 14, 869–874 (2019). https://doi.org/10.1007/s11468-018-0868-2

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  • DOI: https://doi.org/10.1007/s11468-018-0868-2

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