Award Date

2009

Degree Type

Thesis

Degree Name

Master of Science in Electrical Engineering (MSEE)

Department

Electrical and Computer Engineering

Advisor 1

Biswajit Das, Committee Chair

First Committee Member

Yingtao Jiang

Second Committee Member

Mei Yang

Graduate Faculty Representative

Laxmi P. Gewali

Number of Pages

77

Abstract

In this Thesis, I discuss the theory, implementation and applications of Surface enhanced Raman scattering (SERS). Surface enhanced Raman scattering has been used to detect 4 mercaptopyridine molecules. On a Silicon wafer, Gold nanoparticles are deposited onto Copper nanowires. Hotspots occur at the small gap (less than 10nm) between the nanowire and nanoparticle. The interaction of the electromagnetic field of the incident laser and the surface plasmon resonances of the metal nanoparticles at the hot spots enhances the Raman scattering signal of the adsorbed pyridine molecule (10 -3 M ). The dependence of SERS signal on the polarization angle of the incident laser is observed. When compared to other SERS substrates (gold, silver) this one is very economical.

Keywords

Copper nanowires; Gold nanoparticles; Nanotechnology; Semiconductors; Surface enhanced Raman scattering (SERS) substrates

Disciplines

Electrical and Computer Engineering | Nanotechnology Fabrication

Language

English


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