1 July 2007 Sensitive biosensor array using surface plasmon resonance on metallic nanoslits
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J. of Biomedical Optics, 12(4), 044023 (2007). doi:10.1117/1.2772296
Abstract
Chip-based biosensor arrays for label-free and high-throughput detection were fabricated and tested. The sensor array was composed of a 150-nm-thick, 50-nm-gap, and 600-nm-period gold nanoslits. Each array size was 100 μm×100 μm. A transverse-magnetic polarized wave in these metallic nanostructures generated resonant surface plasmons at a wavelength of about 800 nm in a water environment. Using the resonant wavelength shift in the nanoslit array, we achieved detection sensitivity up to 668 nm per refractive index unit, about 1.7 times larger than that reported on an array of nanoholes. An antigen–antibody interaction experiment in an aqueous environment verified the sensitivity in a surface binding event.
Kuang-Li Lee, Chia-Wei Lee, Way-Seen Wang, Pei-Kuan Wei, "Sensitive biosensor array using surface plasmon resonance on metallic nanoslits," Journal of Biomedical Optics 12(4), 044023 (1 July 2007). http://dx.doi.org/10.1117/1.2772296
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KEYWORDS
Gold

Surface plasmons

Biosensors

Water

Glasses

Refractive index

Nanolithography

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