Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes
Anthropogenic toxic vapour and gases are a worldwide threat for human health and to the environment. Therefore, it is crucial to develop highly sensitive devices that guarantee their rapid detection. Here, we prepared redox-switchable colloids by the in-situ reduction of 2,3,5-triphenyl-2H-tetrazoli...
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MDPI AG
2022-06-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/6/213 |
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| author | Esteban Araya-Hermosilla Rodrigo Araya-Hermosilla Francesco Visentin Francesco Picchioni Andrea Pucci Virgilio Mattoli |
| author_facet | Esteban Araya-Hermosilla Rodrigo Araya-Hermosilla Francesco Visentin Francesco Picchioni Andrea Pucci Virgilio Mattoli |
| author_sort | Esteban Araya-Hermosilla |
| collection | DOAJ |
| description | Anthropogenic toxic vapour and gases are a worldwide threat for human health and to the environment. Therefore, it is crucial to develop highly sensitive devices that guarantee their rapid detection. Here, we prepared redox-switchable colloids by the in-situ reduction of 2,3,5-triphenyl-2H-tetrazolium (TTC) into triphenyl formazan (TF) stabilised with Pluronic F127 in aqueous media. The colloids were readily embedded in polydimethylsiloxane (PDMS) to produce a selective colour-switchable membrane for nitrogen dioxide (NO<sub>2</sub>) detection. We found that the TTC reduction resulted in the production of red-coloured colloids with zeta potential between −1 to 3 mV and hydrodynamic diameters between 114 to 305 nm as hydrophobic dispersion in aqueous media stabilised by Pluronic at different molar concentrations. Moreover, the embedded colloids rendered highly homogenous red colour gas-permeable PDMS elastomeric membrane. Once exposed to NO<sub>2</sub>, the membrane began to bleach after 30 s due to the oxidation of the embedded TF and undergo a complete decolouration after 180 s. Such features allowed the membrane integration in a low-cost sensing device that showed a high sensitivity and low detection limit to NO<sub>2</sub>. |
| first_indexed | 2024-03-10T00:07:53Z |
| format | Article |
| id | doaj.art-210be98d4a104189a37e27aaf9d2d65b |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-10T00:07:53Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-210be98d4a104189a37e27aaf9d2d65b2023-11-23T16:04:02ZengMDPI AGChemosensors2227-90402022-06-0110621310.3390/chemosensors10060213Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS MembranesEsteban Araya-Hermosilla0Rodrigo Araya-Hermosilla1Francesco Visentin2Francesco Picchioni3Andrea Pucci4Virgilio Mattoli5Center for Materials Interfaces @SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, ItalyPrograma Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, ChileBioinspired Soft Robotics Laboratory, Istituto Italiano di Tecnologia Viale Rinaldo Piaggio 34, 56025 Pontedera, ItalyDepartment of Chemical Engineering—Product Technology, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The NetherlandsDepartment of Chemistry and Industrial Chemistry, University of Pisa, Via Moruzzi 13, 56124 Pisa, ItalyCenter for Materials Interfaces @SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, ItalyAnthropogenic toxic vapour and gases are a worldwide threat for human health and to the environment. Therefore, it is crucial to develop highly sensitive devices that guarantee their rapid detection. Here, we prepared redox-switchable colloids by the in-situ reduction of 2,3,5-triphenyl-2H-tetrazolium (TTC) into triphenyl formazan (TF) stabilised with Pluronic F127 in aqueous media. The colloids were readily embedded in polydimethylsiloxane (PDMS) to produce a selective colour-switchable membrane for nitrogen dioxide (NO<sub>2</sub>) detection. We found that the TTC reduction resulted in the production of red-coloured colloids with zeta potential between −1 to 3 mV and hydrodynamic diameters between 114 to 305 nm as hydrophobic dispersion in aqueous media stabilised by Pluronic at different molar concentrations. Moreover, the embedded colloids rendered highly homogenous red colour gas-permeable PDMS elastomeric membrane. Once exposed to NO<sub>2</sub>, the membrane began to bleach after 30 s due to the oxidation of the embedded TF and undergo a complete decolouration after 180 s. Such features allowed the membrane integration in a low-cost sensing device that showed a high sensitivity and low detection limit to NO<sub>2</sub>.https://www.mdpi.com/2227-9040/10/6/213redox-active organic nanoparticlespluronic F-127sensing membraneswearable optical device |
| spellingShingle | Esteban Araya-Hermosilla Rodrigo Araya-Hermosilla Francesco Visentin Francesco Picchioni Andrea Pucci Virgilio Mattoli Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes Chemosensors redox-active organic nanoparticles pluronic F-127 sensing membranes wearable optical device |
| title | Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes |
| title_full | Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes |
| title_fullStr | Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes |
| title_full_unstemmed | Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes |
| title_short | Nitrogen Dioxide Optical Sensor Based on Redox-Active Tetrazolium/Pluronic Nanoparticles Embedded in PDMS Membranes |
| title_sort | nitrogen dioxide optical sensor based on redox active tetrazolium pluronic nanoparticles embedded in pdms membranes |
| topic | redox-active organic nanoparticles pluronic F-127 sensing membranes wearable optical device |
| url | https://www.mdpi.com/2227-9040/10/6/213 |
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