Fabrication and Characterization of a Dual-mode SPR/SERS Sensor Based on Plasmonic Nanodome Arrays
Charles J. Choi, Stephen Semancik
This work describes a label-free, optical sensor system fabricated on a flexible plastic film with dual detection modalities: surface-enhanced Raman scattering (SERS) for specific chemical identification and localized surface plasmon resonance (LSPR) for capture-affinity biosensing. The sensor surface is comprised of a close-packed array of 383 nm diameter dome structures with interdome spacing of 14 nm, fabricated by a nanoreplica molding process and unpatterned blanket deposition of SiO2 and Ag thin films. The nanoreplica molding process presented in this work allows for simple, high-throughput fabrication of uniform nanoscale structures (nanodome arrays) over large surface areas without the requirement for high resolution lithography, additional processes such as etching and liftoff, or defect-free deposition of spherical microparticle monolayer templates. Such fabrication characteristics are important for realizing high performance, low-cost measurement technology.
and Semancik, S.
Fabrication and Characterization of a Dual-mode SPR/SERS Sensor Based on Plasmonic Nanodome Arrays, IEEE Sensors 2013, Baltimore, MD, [online], https://doi.org/10.1109/ICSENS.2013.6688128
(Accessed February 24, 2024)