Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink Writing
In this work, the stability, electrical conductivity, and versatility of graphite-based inks were taken advantage of to fabricate a nitrate potentiometric sensor. One other key property that was exploited for the design of an ion-selective electrode was the hydrophobicity of graphite. This prevented...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/11/3/174 |
| _version_ | 1827750749647405056 |
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| author | Franc Paré Aida Visús Gemma Gabriel Mireia Baeza |
| author_facet | Franc Paré Aida Visús Gemma Gabriel Mireia Baeza |
| author_sort | Franc Paré |
| collection | DOAJ |
| description | In this work, the stability, electrical conductivity, and versatility of graphite-based inks were taken advantage of to fabricate a nitrate potentiometric sensor. One other key property that was exploited for the design of an ion-selective electrode was the hydrophobicity of graphite. This prevented the formation of a water layer between the solid contact and the polymeric selective membrane. Moreover, given the use of printing technologies for electrode fabrication, it was possible to easily miniaturize the sensors and achieve lower fabrication costs. In this article, a printed sensor, composed of a graphite working electrode and a Ag/AgCl reference electrode, is presented and thoroughly characterized. The working electrode was modified with a well-known PVC-ionophore membrane, and the reference electrode was protected with a PVB-NaCl saturated membrane. It showed almost-Nernstian sensitivity of −(55.4 ± 0.7) mV/dec to NO<sub>3</sub><sup>−</sup>, stability of up to 25 days of operation, limit of detection of 0.204 ± 0.009 mM, and repeatability of 99.02 % (N = 3). Coupled with its high selectivity compared with other anions, this low-cost, mass-producible sensor is a great alternative for environmental and industrial applications. |
| first_indexed | 2024-03-11T06:47:06Z |
| format | Article |
| id | doaj.art-d148520a795549d09ea837e1ab201167 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-11T06:47:06Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-d148520a795549d09ea837e1ab2011672023-11-17T10:16:19ZengMDPI AGChemosensors2227-90402023-03-0111317410.3390/chemosensors11030174Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink WritingFranc Paré0Aida Visús1Gemma Gabriel2Mireia Baeza3Department of Chemistry, Faculty of Science, Edifici C-Nord, Universitat Autònoma de Barcelona, Carrer dels Til·lers, 08193 Bellaterra, SpainDepartment of Chemistry, Faculty of Science, Edifici C-Nord, Universitat Autònoma de Barcelona, Carrer dels Til·lers, 08193 Bellaterra, SpainInstituto de Microelectrónica de Barcelona, IMB-CNM (CSIC), Esfera UAB, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, SpainDepartment of Chemistry, Faculty of Science, Edifici C-Nord, Universitat Autònoma de Barcelona, Carrer dels Til·lers, 08193 Bellaterra, SpainIn this work, the stability, electrical conductivity, and versatility of graphite-based inks were taken advantage of to fabricate a nitrate potentiometric sensor. One other key property that was exploited for the design of an ion-selective electrode was the hydrophobicity of graphite. This prevented the formation of a water layer between the solid contact and the polymeric selective membrane. Moreover, given the use of printing technologies for electrode fabrication, it was possible to easily miniaturize the sensors and achieve lower fabrication costs. In this article, a printed sensor, composed of a graphite working electrode and a Ag/AgCl reference electrode, is presented and thoroughly characterized. The working electrode was modified with a well-known PVC-ionophore membrane, and the reference electrode was protected with a PVB-NaCl saturated membrane. It showed almost-Nernstian sensitivity of −(55.4 ± 0.7) mV/dec to NO<sub>3</sub><sup>−</sup>, stability of up to 25 days of operation, limit of detection of 0.204 ± 0.009 mM, and repeatability of 99.02 % (N = 3). Coupled with its high selectivity compared with other anions, this low-cost, mass-producible sensor is a great alternative for environmental and industrial applications.https://www.mdpi.com/2227-9040/11/3/174ion-selective electrodepotentiometric sensorprinted electrodescarbon electrodes |
| spellingShingle | Franc Paré Aida Visús Gemma Gabriel Mireia Baeza Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink Writing Chemosensors ion-selective electrode potentiometric sensor printed electrodes carbon electrodes |
| title | Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink Writing |
| title_full | Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink Writing |
| title_fullStr | Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink Writing |
| title_full_unstemmed | Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink Writing |
| title_short | Novel Nitrate Ion-Selective Microsensor Fabricated by Means of Direct Ink Writing |
| title_sort | novel nitrate ion selective microsensor fabricated by means of direct ink writing |
| topic | ion-selective electrode potentiometric sensor printed electrodes carbon electrodes |
| url | https://www.mdpi.com/2227-9040/11/3/174 |
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