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Nanostructured substrate with nanoparticles fabricated by femtosecond laser for surface-enhanced Raman scattering

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Abstract

A simple and fast method to fabricate nanostructured substrates with silver nanoparticles over a large area for surface-enhanced Raman scattering (SERS) is reported. The method involves two steps: (1) dip the substrate into a silver nitrate solution for a few minutes, remove the substrate from the solution, and then air dry and (2) process the silver nitrate coated substrate by femtosecond (fs) laser pulses in air. The second step can create silver nanoparticles distributed on the nanostructured surface of the substrate by the photoreduction of fs multiphoton effects. This study demonstrates that an enhancement factor (EF) greater than 5×105, measured by 10−6 M Rhodamine 6G solution, can be achieved. The proposed technique can be used to integrate the SERS capability into a microchip for biomedical and chemical analysis.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA

    Yukun Han, Zhi Liang, Huilai Sun & Hai-Lung Tsai

  2. School of Mechanical and Electronic Engineering, Tianjin Polytechnic University, Tianjin, 300160, China

    Huilai Sun

  3. Department of Electrical and Computer Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA

    Hai Xiao

Authors
  1. Yukun Han
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  2. Zhi Liang
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  3. Huilai Sun
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  4. Hai Xiao
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  5. Hai-Lung Tsai
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Correspondence to Hai-Lung Tsai.

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Han, Y., Liang, Z., Sun, H. et al. Nanostructured substrate with nanoparticles fabricated by femtosecond laser for surface-enhanced Raman scattering. Appl. Phys. A 102, 415–419 (2011). https://doi.org/10.1007/s00339-010-6091-4

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  • DOI: https://doi.org/10.1007/s00339-010-6091-4

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