Masters Theses

Author

Adam Hamdorf

Abstract

"Surface-enhanced Raman scattering has many applications to chemical science, and shows great promise in the medical field because of its ability to provide "molecular fingerprinting" of probe molecules, whereby a material can be identified and potentially quantified. This is done by enhancing the normally weak Raman spectrum by many orders of magnitude with the use of fabricated substrates. It is therefore desirable to produce repeatable substrates with high enhancement factors for identification and quantification of samples. This thesis introduces a new method for generating such a substrate. By using femtosecond laser machining, gold sputtering, and nanosecond laser annealing, gold nanoparticles were created on the surface of a silicon wafer. SEM images of the substrate are taken to examine the substrate surface generated by the different processing stages. This method of fabrication is both fast and highly repeatable, while at the same time providing high enhancement factors. Using a He-Ne laser with a 632.8 nm wavelength, enhancement factors for Rhodamine 6G were as high a s x 10⁷"--Abstract, page iv.

Advisor(s)

Tsai, Hai-Lung

Committee Member(s)

Xiao, Hai, Dr.
Chandrashekhara, K.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Sponsor(s)

Missouri University of Science and Technology. Department of Mechanical and Aerospace Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2011

Pagination

viii, 18 pages

Note about bibliography

Includes bibliographical references.

Rights

© 2011 Adam David Hamdorf, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Library of Congress Subject Headings

Femtosecond lasers
Nanostructured materials
Raman effect, Surface enhanced

Thesis Number

T 9822

Print OCLC #

792750659

Electronic OCLC #

908693810

Link to Catalog Record

Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b8543453~S5

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