Chemical and Temperature Sensors Based on Functionalized Reduced Graphene Oxide
In this work, we investigated the functionalization of reduced graphene oxide (rGO) with 2-(dodecen-1-yl) succinic anhydride (TPSA) to increase the rGO effective interactions with organic solvents both in liquid and vapor phases. Thermogravimetric analysis, STEM, XPS, FTIR-ATR, and Raman spectroscop...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-06-01
|
| Series: | Chemosensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2227-9040/8/2/43 |
| _version_ | 1797564534056026112 |
|---|---|
| author | Esteban Araya-Hermosilla Matteo Minichino Virgilio Mattoli Andrea Pucci |
| author_facet | Esteban Araya-Hermosilla Matteo Minichino Virgilio Mattoli Andrea Pucci |
| author_sort | Esteban Araya-Hermosilla |
| collection | DOAJ |
| description | In this work, we investigated the functionalization of reduced graphene oxide (rGO) with 2-(dodecen-1-yl) succinic anhydride (TPSA) to increase the rGO effective interactions with organic solvents both in liquid and vapor phases. Thermogravimetric analysis, STEM, XPS, FTIR-ATR, and Raman spectroscopy confirmed the effective functionalization of rGO with about the 30 wt% of grafted TPSA without affecting the structural characteristics of graphene but successfully enhancing its dispersibility in the selected solvent except for the apolar hexane. Solid TPSA-rGO dispersions displayed a reproducible semiconducting (activated) electrical transport with decreased resistance when heated from 20 °C to 60 °C and with a negative temperature coefficient of 10<sup>−3</sup> K<sup>−1</sup>, i.e., comparable in absolute value with temperature coefficient in metals. It is worth noting that the same solid dispersions showed electrical resistance variation upon exposure to vapors with a detection limit in the order of 10 ppm and sensitivity α of about 10<sup>−4</sup> ppm<sup>−1</sup>. |
| first_indexed | 2024-03-10T18:59:30Z |
| format | Article |
| id | doaj.art-b0066d9d3b2b4d68b014024298be72ad |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-10T18:59:30Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-b0066d9d3b2b4d68b014024298be72ad2023-11-20T04:32:04ZengMDPI AGChemosensors2227-90402020-06-01824310.3390/chemosensors8020043Chemical and Temperature Sensors Based on Functionalized Reduced Graphene OxideEsteban Araya-Hermosilla0Matteo Minichino1Virgilio Mattoli2Andrea Pucci3Center for Micro-BioRobotics @SSSA Istituto Italiano di Tecnologia Viale Rinaldo Piaggio 34, 56025 Pontedera, ItalyDepartment of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, 56124 Pisa, ItalyCenter for Micro-BioRobotics @SSSA Istituto Italiano di Tecnologia Viale Rinaldo Piaggio 34, 56025 Pontedera, ItalyDepartment of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, 56124 Pisa, ItalyIn this work, we investigated the functionalization of reduced graphene oxide (rGO) with 2-(dodecen-1-yl) succinic anhydride (TPSA) to increase the rGO effective interactions with organic solvents both in liquid and vapor phases. Thermogravimetric analysis, STEM, XPS, FTIR-ATR, and Raman spectroscopy confirmed the effective functionalization of rGO with about the 30 wt% of grafted TPSA without affecting the structural characteristics of graphene but successfully enhancing its dispersibility in the selected solvent except for the apolar hexane. Solid TPSA-rGO dispersions displayed a reproducible semiconducting (activated) electrical transport with decreased resistance when heated from 20 °C to 60 °C and with a negative temperature coefficient of 10<sup>−3</sup> K<sup>−1</sup>, i.e., comparable in absolute value with temperature coefficient in metals. It is worth noting that the same solid dispersions showed electrical resistance variation upon exposure to vapors with a detection limit in the order of 10 ppm and sensitivity α of about 10<sup>−4</sup> ppm<sup>−1</sup>.https://www.mdpi.com/2227-9040/8/2/43graphenereduced graphene oxidecovalent functionalizationchemical and temperature sensor |
| spellingShingle | Esteban Araya-Hermosilla Matteo Minichino Virgilio Mattoli Andrea Pucci Chemical and Temperature Sensors Based on Functionalized Reduced Graphene Oxide Chemosensors graphene reduced graphene oxide covalent functionalization chemical and temperature sensor |
| title | Chemical and Temperature Sensors Based on Functionalized Reduced Graphene Oxide |
| title_full | Chemical and Temperature Sensors Based on Functionalized Reduced Graphene Oxide |
| title_fullStr | Chemical and Temperature Sensors Based on Functionalized Reduced Graphene Oxide |
| title_full_unstemmed | Chemical and Temperature Sensors Based on Functionalized Reduced Graphene Oxide |
| title_short | Chemical and Temperature Sensors Based on Functionalized Reduced Graphene Oxide |
| title_sort | chemical and temperature sensors based on functionalized reduced graphene oxide |
| topic | graphene reduced graphene oxide covalent functionalization chemical and temperature sensor |
| url | https://www.mdpi.com/2227-9040/8/2/43 |
| work_keys_str_mv | AT estebanarayahermosilla chemicalandtemperaturesensorsbasedonfunctionalizedreducedgrapheneoxide AT matteominichino chemicalandtemperaturesensorsbasedonfunctionalizedreducedgrapheneoxide AT virgiliomattoli chemicalandtemperaturesensorsbasedonfunctionalizedreducedgrapheneoxide AT andreapucci chemicalandtemperaturesensorsbasedonfunctionalizedreducedgrapheneoxide |