Studying Interactions of Gas Molecules with Nanomaterials Loaded in a Microwave Resonant Cavity

A resonant cavity operating in TE011 mode was used to study the adsorption response of single walled carbon nanotubes (SWCNTs) and other nanomaterials for different types of gas molecules. The range of the frequency signal as a probe was chosen as geometry dependent range between 9.1 -9.8 GHz. A highly specific range can be studied for further experiments dependent on the type of molecule being investigated. It was found that for different pressures of gases and for different types of nanomaterials, there was a different response in the shifts of the probe signal for each cycle of gassing and degassing of the cavity. This dissertation suggests that microwave spectroscopy of a complex medium of gases and carbon nanotubes can be used as a highly sensitive technique to determine the complex dielectric response of different polar as well as non-polar gases when subjected to intense electromagnetic fields within the cavity. Also, as part of the experimental work, a range of other micro-porous materials was tested using the residual gas analysis (RGA) technique to determine their intrinsic absorption/adsorption characteristics when under an ultra-high vacuum environment. The scientific results obtained from this investigation, led to the development of a chemical biological sensor prototype. The method proposed is to develop operational sensors to detect toxin gases for homeland security applications and also develop sniffers to detect toxin drugs for law enforcement agency personnel.

Grantor dc:publisher

University of North Texas

Year dc:date

2007

Author dc:creator

• Anand, Aman

Contributors dc:contributor

• Roberts, James A.
• McDaniel, Floyd D.
• Deering, William D.
• Grigolini, Paolo
• Krokhin, Arkadii
• Raman, K. K.

• carbon nanotubes
• toxin sensor
• microwave resonant cavity
• non-polar gases
• resonant cavity
• Nanostructures.
• Nanostructured materials.
• Carbon.
• Microwaves.
• Molecular dynamics.
• Gases.

Statement dc:rights

• Public
• Copyright
• Alexander, Sandra G.
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 191800728
https://digital.library.unt.edu/ark:/67531/metadc4009/
ark: ark:/67531/metadc4009

OAI identifier oai:identifier

info:ark/67531/metadc4009