Title | Carbon-nanotube loaded antenna-based ammonia gas sensor |
Publication Type | Journal Article |
Year of Publication | 2011 |
Authors | Lee, H., G. Shaker, K. Naishadham, X. Song, M. McKinley, B. Wagner, and M. Tentzeris |
Journal | IEEE Transactions on Microwave Theory and Techniques |
Volume | 59 |
Start Page | 2665 |
Issue | 10 |
Pagination | 2665-2673 |
Date Published | 09/2011 |
Abstract | Carbon nanotubes (CNTs) have been researched extensively for gas-sensing applications due to their unique electrical, chemical, and structural properties. Single-walled carbon nanotubes (SWNTs) have been predominantly used due to their superior electrical conductivity and higher sensitivity relative to multiwalled CNTs. This paper presents the design and characterization of a novel planar sensor fabricated on paper substrate to detect small concentrations of ammonia gas, using the shift in resonance frequency of a patch antenna as the discriminator. We have investigated three main design issues in depth. First, functionalization of the SWNTs with a polymer is studied in order to enhance the gas detection sensitivity. Second, a thin film of the functionalized SWNT is characterized to create a surface impedance model for the explanation and prediction of the resonance shift due to different gas concentrations … |
URL | https://ieeexplore.ieee.org/abstract/document/6016223 |