DPN writing on non-flat gold surfaces and detection by SERS

Robert J. Stokes; Jennifer A. Dougan; Eleanore Irvine; Jenifer Ohayon; Sergey Rozhok; Tom Levesque; Bruce Dudzik; Mike Nelson; Duncan Graham

doi:10.1117/12.811523

18 February 2009 DPN writing on non-flat gold surfaces and detection by SERS

Robert J. Stokes, Jennifer A. Dougan, Eleanore Irvine, Jenifer Ohayon, Sergey Rozhok, Tom Levesque, Bruce Dudzik, Mike Nelson, Duncan Graham

Author Affiliations +

Proceedings Volume 7207, Microfluidics, BioMEMS, and Medical Microsystems VII; 720703 (2009) https://doi.org/10.1117/12.811523
Event: SPIE MOEMS-MEMS: Micro- and Nanofabrication, 2009, San Jose, California, United States

Abstract

There is a need for fast, reliable and sensitive biosensor arrays. We have used nanostructured plasmonic gold surfaces for the detection of biological species by surface enhanced resonance Raman scattering (SERRS). Careful, directed placement by Dip-Pen Nanolithography (DPN) of the biological species or capture chemistry, within the array facilitates efficient read out via fast Raman line mapping. In addition, we can apply parallel deposition methods to enhance the throughput of these combined techniques. SERRS is an extremely sensitive spectroscopic technique that offers several advantages over conventional fluorescence detection. For example, the high sensitivity of the method allows detection of DNA capture from single plasmonic array "pixels" ~1 μm² in area. Additionally, the information rich nature of the SERRS spectrum allows multiple levels of detection to be embedded into each pixel, further increasing the information depth of the array. By moving from micro- to nano-scale features, sensor chips can contain up to 105 times more information, dramatically increasing the capacity for disease screening.

Citation Download Citation

Robert J. Stokes, Jennifer A. Dougan, Eleanore Irvine, Jenifer Ohayon, Sergey Rozhok, Tom Levesque, Bruce Dudzik, Mike Nelson, and Duncan Graham "DPN writing on non-flat gold surfaces and detection by SERS", Proc. SPIE 7207, Microfluidics, BioMEMS, and Medical Microsystems VII, 720703 (18 February 2009); https://doi.org/10.1117/12.811523

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KEYWORDS

Scanning probe lithography

Gold

Raman spectroscopy

Surface enhanced Raman spectroscopy

Plasmonics

Resonance enhancement

Raman scattering

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