Highly-selective Chemiresistive Sensing and Analysis of Vapors Using Functionalized Nanotubes
type: CreativeWork
description: Specifically, the project involves the development of a diversified array of nanostructured gas-sensors comprised of selectively, novel surface-functionalized carbon nanotubes (for analyte selectivity by virtue of functionality). Harnessing carbon nanotubes with various electron withdrawing and donating groups help in determining their affinity toward certain prognostic gaseous markers thus increasing specificity of such created sensors. We have devised synthetic routes that have led to the facile production of covalently polyfunctionalized nanotubes in high yield. Seven carbon nanotube analogues were systematically considered and then chemically synthesized, from pristine single-walled nanotubes (SWNT's), for use as the main component of sensory units that was used for this study. The basic chemical structure of these functionalized nanotubes; namely: poly(p-phenol)-co-SWNT [1], poly(p-nitrobenzene)-co-SWNT [2], poly(p-fluorobenzene)-co-SWNT [3], poly(p-aniline)-co-SWNT [4], polybromide-SWNT [5] , poly(p-thiophenol-co-SWNT [6] and poly(p-benzonitrile-co-SWNT [7]. The ability to manufacture total organic sensors was demonstrated using carbon nanotube based architectures. These derivatized-nanotube-based materials are designed to serve as chemoreceptors that can facilitate the development of highly selective and sensitive chemical and biological sensor arrays through an "electronic nose" approach which mimics the mammalian olfactory system. Functionalized SWNTs (f-SWNTs) were dispersed in dimethyl formamide (DMF) and mCresol and spun-applied to the interdigitated regions of micro-lithographically fabricated, pre-cleaned interdigitated microsensor electrodes (IME 1025-M-Pt and Au). Measured changes in the electrical conductivities of an array of gas sensors upon exposure to selected vapors and inert explosive materials were monitored. These changes are transduced into electrical signals, which are preprocessed and conditioned before identification by a pattern recogni…
abstract: Specifically, the project involves the development of a diversified array of nanostructured gas-sensors comprised of selectively, novel surface-functionalized carbon nanotubes (for analyte selectivity by virtue of functionality). Harnessing carbon nanotubes with various electron withdrawing and donating groups help in determining their affinity toward certain prognostic gaseous markers thus increasing specificity of such created sensors. We have devised synthetic routes that have led to the facile production of covalently polyfunctionalized nanotubes in high yield. Seven carbon nanotube analogues were systematically considered and then chemically synthesized, from pristine single-walled nanotubes (SWNT's), for use as the main component of sensory units that was used for this study. The basic chemical structure of these functionalized nanotubes; namely: poly(p-phenol)-co-SWNT [1], poly(p-nitrobenzene)-co-SWNT [2], poly(p-fluorobenzene)-co-SWNT [3], poly(p-aniline)-co-SWNT [4], polybromide-SWNT [5] , poly(p-thiophenol-co-SWNT [6] and poly(p-benzonitrile-co-SWNT [7]. The ability to manufacture total organic sensors was demonstrated using carbon nanotube based architectures. These derivatized-nanotube-based materials are designed to serve as chemoreceptors that can facilitate the development of highly selective and sensitive chemical and biological sensor arrays through an "electronic nose" approach which mimics the mammalian olfactory system. Functionalized SWNTs (f-SWNTs) were dispersed in dimethyl formamide (DMF) and mCresol and spun-applied to the interdigitated regions of micro-lithographically fabricated, pre-cleaned interdigitated microsensor electrodes (IME 1025-M-Pt and Au). Measured changes in the electrical conductivities of an array of gas sensors upon exposure to selected vapors and inert explosive materials were monitored. These changes are transduced into electrical signals, which are preprocessed and conditioned before identification by a pattern recogni…
author: Hines, Deon
keywords: Chemistry, Mechanics of Materials, Nanoscience and Nanotechnology, Chemiresistor, Electronic Nose, Nano-device, Sensors, SWNTs
date published: 2015-02-01T08:00:00Z
date modified: 2026-07-24T01:58:39Z
provider: City University of New York - Graduate Center
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: The Graduate School and University Center of The City University of New York