Room temperature amine sensors enabled by sidewall functionalization of single-walled carbon nanotubes
| Autor: | Brunetto Cortigiani, Fabio Di Francesco, Francesca G. Bellagambi, Matteo Mannini, Pietro Salvo, Timothy M. Swager, Clara Paoletti, Bernando Melai, Nicola Calisi, Andrea Pucci, Maggie He |
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| Rok vydání: | 2018 |
| Předmět: |
General Chemical Engineering
Carboxylic acid Ethyl acetate Trimethylamine 02 engineering and technology Carbon nanotube 010402 general chemistry ammonia 01 natural sciences Article amine sensors carbon nanotubes trimethylamine nitrene chemistry law.invention chemistry.chemical_compound law Acetone Acetonitrile Benzene chemistry.chemical_classification Chloroform General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry AMMONIA GAS SENSORS MWCNTS TRIMETHYLAMINE NANOCOMPOSITES 0210 nano-technology Nuclear chemistry |
| Zdroj: | RSC Advances. 8:5578-5585 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c7ra13304a |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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