Research Papers

Nanoreplicated positive and inverted submicrometer polymer pyramid array for surface-enhanced Raman spectroscopy

[+] Author Affiliations
Zhida Xu, Hsin-Yu Wu, Syed Usman Ali, Jing Jiang

University of Illinois at Urbana-Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois 61801

Brian T. Cunningham, Gang Logan Liu

University of Illinois at Urbana-Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois 61801

University of Illinois at Urbana-Champaign, Department of Bioengineering, Urbana, Illinois 61801

J. Nanophoton. 5(1), 053526 (November 28, 2011). doi:10.1117/1.3663259
History: Received September 20, 2011; Revised November 01, 2011; Accepted November 02, 2011; Published November 28, 2011; Online November 28, 2011
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We demonstrated gold-coated polymer surface enhanced Raman scattering (SERS) substrates with a pair of complementary structures—positive and inverted pyramid array structures fabricated by a multiple-step molding and replication process. The uniform SERS enhancement factors over the entire device surface were measured as 7.2×104 for positive pyramid substrates while 1.6×106 for inverted pyramid substrates with Rhodamine 6G as the target analyte. Based on the optical reflection measurement and finite difference time domain simulation result, the enhancement factor difference is attributable to plasmon resonance matching and to SERS “hot spots” distribution. With this simple, fast, and versatile complementary molding process, we can produce polymer SERS substrates with extremely low cost, high throughput, and high repeatability.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Zhida Xu ; Hsin-Yu Wu ; Syed Usman Ali ; Jing Jiang ; Brian T. Cunningham, et al.
"Nanoreplicated positive and inverted submicrometer polymer pyramid array for surface-enhanced Raman spectroscopy", J. Nanophoton. 5(1), 053526 (November 28, 2011). ; http://dx.doi.org/10.1117/1.3663259


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