Self-Powered Potentiometric Sensor Based on a Passive Signal Amplifier with Electronic Paper DisplayClick to copy article linkArticle link copied!
- Aori QilengAori QilengDepartment of Inorganic and Analytical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1211 Geneva, SwitzerlandKey Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, ChinaMore by Aori Qileng
- Yaotian WuYaotian WuDepartment of Inorganic and Analytical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1211 Geneva, SwitzerlandMore by Yaotian Wu
- Yingju Liu*Yingju Liu*E-mail: [email protected] (Y. Liu).Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, ChinaMore by Yingju Liu
- Eric Bakker*Eric Bakker*E-mail: [email protected] (E. Bakker).Department of Inorganic and Analytical Chemistry, University of Geneva, Quai Ernest-Ansermet 30, CH-1211 Geneva, SwitzerlandMore by Eric Bakker
Abstract
Self-powered potentiometric sensors are attractive because of their simple operation, low cost, fast response, and ability to be integrated with electronic components. Self-powered potentiometric sensors that give a direct colorimetric output are especially interesting, because no power supply is needed, which dramatically reduces waste. Recently reported work from our group using an electronic paper display, however, exhibits limitations, because the visualization of small pH changes is difficult. A self-powered ion-selective potentiometric sensor is introduced here that may amplify the e-paper pixel sensitivity by improving the self-powered circuit. The voltage is amplified by changing the circuit from incorporating parallel to incorporating serial capacitors. With three such capacitors, a greatly improved sensitivity is observed, amplifying the absorbance 3-fold. A portable device is realized that changes the position of the capacitors from parallel to serial through a simple mechanical sliding action. As a result, the pH information on the sample is more easily visualized with a pH uncertainty of about 0.1 when comparing the e-paper output to a color card.
Cited By
This article is cited by 1 publications.
- Yaotian Wu, Yupu Zhang, Aori Qileng, Eric Bakker. Self-Powered Potentiometric Sensor with Relational Operation Function to Capture Concentration Excursions. Analytical Chemistry 2024, 96
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, 18401-18407. https://doi.org/10.1021/acs.analchem.4c03081
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