Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer

Surface-enhanced Raman scattering enhances the weak Raman scattering by using a roughened metal-coated surface as a catalyst. Roughness in the nanometer range provides the best enhancement. The nanostructures for the surface-enhanced Raman spectroscopy (SERS) substrates, in this work, are generated...

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Main Author: Malempati, Pallavi Rao
Other Authors: Hah, Dooyoung
Format: Others
Language:en
Published: LSU 2011
Subjects:
Online Access:http://etd.lsu.edu/docs/available/etd-11112011-103621/
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spelling ndltd-LSU-oai-etd.lsu.edu-etd-11112011-1036212013-01-07T22:53:46Z Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer Malempati, Pallavi Rao Electrical & Computer Engineering Surface-enhanced Raman scattering enhances the weak Raman scattering by using a roughened metal-coated surface as a catalyst. Roughness in the nanometer range provides the best enhancement. The nanostructures for the surface-enhanced Raman spectroscopy (SERS) substrates, in this work, are generated using an electrochemical etching process on silicon substrates. The patterns of nanoporous silicon thus generated are transferred onto transparent polydimethylsiloxane (PDMS) substrates using the lift-off process. An incomplex sputtering technique is employed to coat this substrate with a ~20 nm aluminum layer. Rhodamine 6G (R6G) molecules, when adsorbed to this metal surface, form the final SERS substrate that undergoes Raman spectroscopy characterization. This technique is expected to be useful when simple and photolithography-free techniques need to be employed for SERS substrate fabrication. Hah, Dooyoung Feldman, Martin Daniels-Race, Theda LSU 2011-11-14 text application/pdf http://etd.lsu.edu/docs/available/etd-11112011-103621/ http://etd.lsu.edu/docs/available/etd-11112011-103621/ en unrestricted I hereby certify that, if appropriate, I have obtained and attached herein a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to LSU or its agents the non-exclusive license to archive and make accessible, under the conditions specified below and in appropriate University policies, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.
collection NDLTD
language en
format Others
sources NDLTD
topic Electrical & Computer Engineering
spellingShingle Electrical & Computer Engineering
Malempati, Pallavi Rao
Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer
description Surface-enhanced Raman scattering enhances the weak Raman scattering by using a roughened metal-coated surface as a catalyst. Roughness in the nanometer range provides the best enhancement. The nanostructures for the surface-enhanced Raman spectroscopy (SERS) substrates, in this work, are generated using an electrochemical etching process on silicon substrates. The patterns of nanoporous silicon thus generated are transferred onto transparent polydimethylsiloxane (PDMS) substrates using the lift-off process. An incomplex sputtering technique is employed to coat this substrate with a ~20 nm aluminum layer. Rhodamine 6G (R6G) molecules, when adsorbed to this metal surface, form the final SERS substrate that undergoes Raman spectroscopy characterization. This technique is expected to be useful when simple and photolithography-free techniques need to be employed for SERS substrate fabrication.
author2 Hah, Dooyoung
author_facet Hah, Dooyoung
Malempati, Pallavi Rao
author Malempati, Pallavi Rao
author_sort Malempati, Pallavi Rao
title Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer
title_short Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer
title_full Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer
title_fullStr Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer
title_full_unstemmed Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer
title_sort surface-enhanced raman spectroscopy substrates based on nanoporous silicon and pattern transfer
publisher LSU
publishDate 2011
url http://etd.lsu.edu/docs/available/etd-11112011-103621/
work_keys_str_mv AT malempatipallavirao surfaceenhancedramanspectroscopysubstratesbasedonnanoporoussiliconandpatterntransfer
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