Raman Spectroscopy of PbI2 Double-Walled Carbon Nanotubes

Bryan DeBono

Date of Award

2006

Document Type

Thesis

Degree Name

Bachelors

Department

Natural Sciences

First Advisor

Sendova, Mariana

Keywords

Carbon Nanotubes, Raman Spectroscopy, Non-Destructive Characterization

Area of Concentration

Physics

Abstract

Due to their outstanding mechanical, thermal, and electronic properties carbon nanotubes promise incredible technological advances and have become one of the most highly-researched areas in all of materials science. Double-walled carbon nanotubes (DWCNTs) are a relatively recent interest in this field. This variety of nanotube consists of two concentric single-walled carbon nanotubes bound together by electrostatic forces, and bridges the gap between the single-walled and multi-walled varieties of carbon nanotubes. My work centered on using Raman spectroscopy to analyze double-walled carbon nanotubes that had been filled with PbI2. I was especially interested in examining the structure of PbI2 that has crystallized between the concentric walls of a DWCNT. Pristine PbI2 is a direct gap semiconductor with a hexagonal crystal structure, however, it is theorized that the gap between the walls of a DWCNT (~1nm) is too small to allow PbI2 to crystallize in this form. A weakening was observed in the structural integrity of the outer nanotube wall; this has also been found in DWCNTs filled with related compounds.

Rights

This bibliographic record is available under the Creative Commons CC0 public domain dedication. The New College of Florida, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.

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