NDLI: Surface-enhanced Raman scattering nanodomes fabricated by nanoreplica molding

Content Provider	IEEE Xplore Digital Library
Author	Choi, C.J. Zhida Xu Hsin-Yu Wu Liu, G.L. Cunningham, B.T.
Copyright Year	2010
Description	Author affiliation: Department of Electrical and Computer Engineering, Micro and Nanotechnology Laboratory, University of Illinois at Urbana-Champaign, 208 North Wright Street, 61801, USA (Choi, C.J.; Zhida Xu; Hsin-Yu Wu; Liu, G.L.; Cunningham, B.T.)
Abstract	We demonstrate a surface-enhanced Raman scattering substrate consisting of a closely spaced metal nanodome array fabricated on flexible plastic film. We used a low cost, large area replica molding process to produce a 2-dimensional periodic array of cylinders that is subsequently overcoated with SiO and silver thin films to form dome-shaped structures. Finite element modeling was used to investigate the electromagnetic field distribution of the nanodome array structure and the effect of the nanodome separation distance on the electromagnetic field enhancement. The SERS enhancement from the nanodome array substrates was experimentally verified using rhodamine 6G as the analyte. With a separation distance of 17 nm achieved between adjacent domes using a process that is precisely controlled during thin film deposition, a reproducible SERS enhancement factor of $1.37×10^{8}$ was demonstrated. The nanoreplica molding process presented in this work allows for simple, low cost, high-throughput fabrication of uniform nanoscale SERS substrates over large surface areas without the requirement for high resolution lithography or defect-free deposition of spherical microparticle monolayer templates.
Starting Page	2638
Ending Page	2643
File Size	1562607
Page Count	6
File Format	PDF
ISBN	9781424481705
ISSN	19300395
e-ISBN	9781424481699
e-ISBN	9781424481682
DOI	10.1109/ICSENS.2010.5690241
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arrays Substrates Electric fields Surface treatment Metals Raman scattering Polymers
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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