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RSC Adv

Title:		Room temperature amine sensors enabled by sidewall functionalization of single-walled carbon nanotubes
Author(s):		Paoletti C; He M; Salvo P; Melai B; Calisi N; Mannini M; Cortigiani B; Bellagambi FG; Swager TM; Di Francesco F; Pucci A;
Address:		"Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, 56124 Pisa, Italy. Department of Chemistry, Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, USA. Institute of Clinical Physiology, National Council of Research (IFC-CNR), Via G. Moruzzi 1, Pisa, Italy. Department of Chemistry 'U. Schiff', University of Florence, Via della Lastruccia 3-13, 50019 Sesto Fiorentino (FI), Italy. National Interuniversity Consortium of Materials Science and Technology (INSTM), Via G. Giusti 9, 50121 Firenze, Italy"
Journal Title:		RSC Adv
Year:		2018
Volume:		20180201
Issue:		10
Page Number:		5578 - 5585
DOI:		10.1039/C7RA13304A
ISSN/ISBN:		2046-2069 (Print) 2046-2069 (Electronic) 2046-2069 (Linking)
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(6)F(4)CO(2)CH(3)) and 4-azido-2,3,5,6-tetrafluorobenzoic acid (SWCNT-N-C(6)F(4)CO(2)H) attached every 213 and 109 carbon atoms, respectively. Notably, SWCNT-N-C(6)F(4)CO(2)H was sensitive in terms of the percentage of conductance variation from 5 to 40 ppm of ammonia (NH(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(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(3)CN), acetone and chloroform (CHCl(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(3) and TMA at room temperature"
Keywords:
Notes:		"PubMed-not-MEDLINEPaoletti, Clara He, Maggie Salvo, Pietro Melai, Bernardo Calisi, Nicola Mannini, Matteo Cortigiani, Brunetto Bellagambi, Francesca G Swager, Timothy M Di Francesco, Fabio Pucci, Andrea eng P42 ES027707/ES/NIEHS NIH HHS/ T32 ES007020/ES/NIEHS NIH HHS/ England 2018/01/01 RSC Adv. 2018; 8(10):5578-5585. doi: 10.1039/C7RA13304A. Epub 2018 Feb 1"