1. Fabrication of cost-effective, highly reproducible large area arrays of nanotriangular pillars for surface enhanced Raman scattering substrates
- Author
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies, Hasna, Kudilatt, Antony, Aldrin, Puigdollers i González, Joaquim, Kumar, Kumaran Rajeev, Jayaraj, M. K., Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. MNT - Grup de Recerca en Micro i Nanotecnologies, Hasna, Kudilatt, Antony, Aldrin, Puigdollers i González, Joaquim, Kumar, Kumaran Rajeev, and Jayaraj, M. K.
- Abstract
Development of cost-effective, highly reproducible non-conventional fabrication techniques for anisotropic metal nanostructures is essential to realizing potential applications of plasmonic devices, photonic devices, and surface enhanced Raman scattering (SERS) phenomenon based sensors. This report highlights the fabrication of nanotriangle arrays via nanoimprinting to overcome difficulties in creating large-area SERS active substrates with uniform, reproducible Raman signals. Electron beam lithography of anisotropic nanostructures, formation of arrays of nanotriangles in silicon and the transfer of triangular shapes to polymethylmethacrylate (PMMA) sheets via nanoimprinting have not been reported elsewhere. The reuse of silicon masters offers potential for production of low cost SERS substrates. The SERS activity and reproducibility of nanotriangles are illustrated and a consistent average enhancement factor of up to ~2.9 × 1011, which is the highest value reported for a patterned SERS substrate, is achieved., Peer Reviewed, Postprint (author's final draft)
- Published
- 2016