IEEE Photonics Journal (Jan 2021)

Femtosecond Laser Structuring for Flexible Surface-Enhanced Raman Spectroscopy Substrates

  • Li-Nan Fang,
  • Ji-Chao Li,
  • Jia-Rui Zhang,
  • Dong-Dong Han

DOI
https://doi.org/10.1109/JPHOT.2021.3069648
Journal volume & issue
Vol. 13, no. 2
pp. 1 – 8

Abstract

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Surface-enhanced Raman spectroscopy (SERS) is an optical technique for molecule identification. However, fabrication of flexible and structured SERS substrates for performance improvement in a facile and cost-effective manner is challenging. In this work, we reported a polytetrafluoroethylene (PTFE)-based flexible SERS substrate by femtosecond laser direct writing (FsLDW) technology. The femtosecond laser-treated PTFE surface is 3D hierarchical micro-/nano-structures, and the structured PTFE-based SERS chip shows excellent performance enhancement. As a result, 10−7 M can be detected, which shows excellent potentials in developing flexible SERS for wearable electronics.

Keywords