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Plasmonic nanodome array fabricated on plastic as a dual-mode surface plasmon resonance and surface- enhanced Raman scattering sensor

Published

Author(s)

Charles J. Choi, Stephen Semancik

Abstract

Label-free optical sensors have recently emerged as a highly sensitive approach for detecting a broad range of chemical and biological analytes that include illicit drug compounds, explosives, proteins, viruses, and bacteria.To best meet such diverse monitoring needs, different sensing methods have been used. For example, detection of chemical compounds typically requires specific chemical identification method, such as Raman spectroscopy, while proteins or bacteria are most effectively detected by performing capture affinity assays using surface plasmon resonance biosensors. Therefore, the integration of multiple detection modalities into a single, substrate- based sensing platform would offer highly complementary capabilities that allow a variety of analytes to be detected simultaneously. This work describes a label-free, optical sensor system fabricated on a flexible plastic film using nanoreplica molding process 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 process that combines nanoreplica molding and unpatterned blanket deposition of SiO2 and Ag thin films.
Proceedings Title
Proceedings of the Nanotech Conference and Expo 2013
Conference Dates
May 12, 2013-May 16, 2014
Conference Location
Washington, DC, US
Conference Title
TechConnect World

Citation

Choi, C. and Semancik, S. (2014), Plasmonic nanodome array fabricated on plastic as a dual-mode surface plasmon resonance and surface- enhanced Raman scattering sensor, Proceedings of the Nanotech Conference and Expo 2013 , Washington, DC, US (Accessed May 21, 2024)

Issues

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Created May 11, 2014, Updated October 12, 2021