Journal
IEEE PHOTONICS JOURNAL
Volume 13, Issue 2, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2021.3069648
Keywords
Substrates; Surface morphology; Lasers; Three-dimensional displays; Surface treatment; Surface roughness; Rough surfaces; Raman spectroscopy; ultrafast lasers; ultrafast nonlinear processes
Funding
- National Natural Science Foundation of China [82003284, 61905087, 61935008, 61775078]
- Scientific Research Foundation of The First Hospital of Jilin University [JDYY11202015]
- Postdoctoral Science Foundation of China [2020T130237, 2020M670850]
- Fundamental Research Funds for the Central Universities [2020-JCXK-18]
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In this study, a flexible SERS substrate based on PTFE was fabricated using femtosecond laser direct writing technology, which showed excellent performance enhancement with 3D hierarchical micro-/nano-structures on the surface. The structured PTFE-based SERS chip was capable of detecting concentrations as low as 10(-7) M, indicating great potential for developing flexible SERS for wearable electronics.
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.
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