Title page for ETD etd-11112011-103621

Type of Document Master's Thesis
Author Malempati, Pallavi Rao
Author's Email Address mrao2@lsu.edu
URN etd-11112011-103621
Title Surface-enhanced Raman Spectroscopy Substrates Based on Nanoporous Silicon and Pattern Transfer
Degree Master of Science in Electrical Engineering (M.S.E.E.)
Department Electrical & Computer Engineering
Advisory Committee
Advisor Name Title
Hah, Dooyoung Committee Chair
Daniels-Race, Theda Committee Member
Feldman, Martin Committee Member
  • Pattern Transfer
  • SERS substrates
  • PDMS
Date of Defense 2011-11-09
Availability unrestricted
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.
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