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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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. |
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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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1716478294273032192 |