Award Date

5-2011

Degree Type

Thesis

Degree Name

Master of Science in Electrical Engineering (MSEE)

Department

Electrical and Computer Engineering

First Committee Member

Biswajit Das, Chair

Second Committee Member

Yingtao Jiang

Third Committee Member

Mei Yang

Graduate Faculty Representative

Yoohwan Kim

Number of Pages

51

Abstract

Due to their large surface to volume ratio nanostructures are inherently unstable. To insure long term stability of nano-devices, they have to be rendered inert to their environment. In this study, nanoporous gold films(NPGF) and multiwall carbon nanotubes were coated with ALD alumina of varying thicknesses. Subsequently, the plasmonic property of the former and electronic property of the latter was monitored by Transmittance and Raman Spectroscopy respectively. Transmittance spectra revealed that NPGF passivated by ALD-alumina maintains its plasmonic properties, i.e. its LSPR supporting properties remained intact. Raman spectra of ALD alumina passivated MWNTs show no coating induced changes in its characteristic Raman features. This led to the conclusion that ALD alumina is a benign and suitable technique for thin film passivation of NPGF and MWNTs. This result supports the expansion of ALD’s domain as a reliable thin film passivation technique in areas of SERS based biosensor research and the passivation of carbon nanotubes.

Keywords

Aluminum oxide; Atomic layer deposition alumina; Coatings; Nanostructures; Nanostructures – Stability; Nanotubes; Thin films

Disciplines

Electrical and Electronics | Nanoscience and Nanotechnology

Language

English


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