Room temperature amine sensors enabled by sidewall functionalization of single-walled carbon nanotubes
Name
c7ra13304a.pdf
Description
Published version
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724.35 KB
Format
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Checksum (MD5)
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Author(s)
Paoletti, Clara
He, Maggie
Salvo, Pietro
Melai, Bernando
Calisi, Nicola
Mannini, Matteo
Cortigiani, Brunetto
Bellagambi, Francesca G.
Swager, Timothy M.
Di Francesco, Fabio
Date Issued
February 2018
Journal
RSC Advances
Publisher
Royal Society of Chemistry (RSC)
Citation
Paoletti, Clara, et al. “Room Temperature Amine Sensors Enabled by Sidewall Functionalization of Single-Walled Carbon Nanotubes.” RSC Advances 8, 10 (2018): 5578–85. © 2018 The Royal Society of Chemistry
Version
Final published version
Abstract
A new series of sidewall modified single-walled carbon nanotubes (SWCNTs) with perfluorophenyl molecules bearing carboxylic acid or methyl ester moieties are herein reported. Pristine and functionalized SWCNTs (p-SWCNTs and f-SWCNTs, respectively) were characterized by X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and scanning electron microscopy (SEM). The nitrene-based functionalization provided intact SWCNTs with methyl 4-azido-2,3,5,6-tetrafluorobenzoate (SWCNT-N-C[subscript 6]F[subscript 4]CO[subscript 2]CH[subscript 3]) and 4-azido-2,3,5,6-tetrafluorobenzoic acid (SWCNT-N-C[subscript 6]F[subscript 4]CO[subscript 2]H) attached every 213 and 109 carbon atoms, respectively. Notably, SWCNT-N-C[subscript 6]F[subscript 4]CO[subscript 2]H was sensitive in terms of the percentage of conductance variation from 5 to 40 ppm of ammonia (NH[subscript 3]) and trimethylamine (TMA) with a two-fold higher variation of conductance compared to p-SWCNTs at 40 ppm. The sensors are highly sensitive to NH[subscript 3] and TMA as they showed very low responses (0.1%) toward 200 ppm of volatile organic compounds (VOCs) containing various functional groups representative of different classes of analytes such as benzene, tetrahydrofurane (THF), hexane, ethyl acetate (AcOEt), ethanol, acetonitrile (CH[subscript 3]CN), acetone and chloroform (CHCl[subscript 3]). Our system is a promising candidate for the realization of single-use chemiresistive sensors for the detection of threshold crossing by low concentrations of gaseous NH[subscript 3] and TMA at room temperature.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution 3.0 unported license
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DOI of Published Version
https://doi.org/10.1039/C7RA13304A
