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Chen KY, Kachhadiya J, Muhtasim S, Cai S, Huang J, Andrews J. Underground Ink: Printed Electronics Enabling Electrochemical Sensing in Soil. MICROMACHINES 2024; 15:625. [PMID: 38793198 PMCID: PMC11123188 DOI: 10.3390/mi15050625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 05/02/2024] [Accepted: 05/04/2024] [Indexed: 05/26/2024]
Abstract
Improving agricultural production relies on the decisions and actions of farmers and land managers, highlighting the importance of efficient soil monitoring techniques for better resource management and reduced environmental impacts. Despite considerable advancements in soil sensors, their traditional bulky counterparts cause difficulty in widespread adoption and large-scale deployment. Printed electronics emerge as a promising technology, offering flexibility in device design, cost-effectiveness for mass production, and a compact footprint suitable for versatile deployment platforms. This review overviews how printed sensors are used in monitoring soil parameters through electrochemical sensing mechanisms, enabling direct measurement of nutrients, moisture content, pH value, and others. Notably, printed sensors address scalability and cost concerns in fabrication, making them suitable for deployment across large crop fields. Additionally, seamlessly integrating printed sensors with printed antenna units or traditional integrated circuits can facilitate comprehensive functionality for real-time data collection and communication. This real-time information empowers informed decision-making, optimizes resource management, and enhances crop yield. This review aims to provide a comprehensive overview of recent work related to printed electrochemical soil sensors, ultimately providing insight into future research directions that can enable widespread adoption of precision agriculture technologies.
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Affiliation(s)
- Kuan-Yu Chen
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA; (K.-Y.C.); (J.K.); (S.M.)
| | - Jeneel Kachhadiya
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA; (K.-Y.C.); (J.K.); (S.M.)
| | - Sharar Muhtasim
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA; (K.-Y.C.); (J.K.); (S.M.)
| | - Shuohao Cai
- Department of Soil Science, University of Wisconsin-Madison, Madison, WI 53706, USA; (S.C.); (J.H.)
| | - Jingyi Huang
- Department of Soil Science, University of Wisconsin-Madison, Madison, WI 53706, USA; (S.C.); (J.H.)
| | - Joseph Andrews
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA; (K.-Y.C.); (J.K.); (S.M.)
- Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
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Kohler MC, Li F, Dong Z, Amineh RK. Real-Time Nitrate Ion Monitoring with Poly(3,4-ethylenedioxythiophene) (PEDOT) Materials. SENSORS (BASEL, SWITZERLAND) 2023; 23:7627. [PMID: 37688083 PMCID: PMC10490648 DOI: 10.3390/s23177627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 08/10/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023]
Abstract
Nitrate (NO3) pollution in groundwater, caused by various factors both natural and synthetic, contributes to the decline of human health and well-being. Current techniques used for nitrate detection include spectroscopic, electrochemical, chromatography, and capillary electrophoresis. It is highly desired to develop a simple cost-effective alternative to these complex methods for nitrate detection. Therefore, a real-time poly (3,4-ethylenedioxythiophene) (PEDOT)-based sensor for nitrate ion detection via electrical property change is introduced in this study. Vapor phase polymerization (VPP) is used to create a polymer thin film. Variations in specific parameters during the process are tested and compared to develop new insights into PEDOT sensitivity towards nitrate ions. Through this study, the optimal fabrication parameters that produce a sensor with the highest sensitivity toward nitrate ions are determined. With the optimized parameters, the electrical resistance response of the sensor to 1000 ppm nitrate solution is 41.79%. Furthermore, the sensors can detect nitrate ranging from 1 ppm to 1000 ppm. The proposed sensor demonstrates excellent potential to detect the overabundance of nitrate ions in aqueous solutions in real time.
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Affiliation(s)
- Michael C. Kohler
- Department of Electrical and Computer Engineering, New York Institute of Technology, College of Engineering and Computing Sciences, Old Westbury, NY 11568, USA;
| | - Fang Li
- Department of Mechanical Engineering, New York Institute of Technology, College of Engineering and Computing Sciences, Old Westbury, NY 11568, USA
| | - Ziqian Dong
- Department of Electrical and Computer Engineering, New York Institute of Technology, College of Engineering and Computing Sciences, New York, NY 10023, USA;
| | - Reza K. Amineh
- Department of Electrical and Computer Engineering, New York Institute of Technology, College of Engineering and Computing Sciences, New York, NY 10023, USA;
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Wardak C, Morawska K, Pietrzak K. New Materials Used for the Development of Anion-Selective Electrodes-A Review. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5779. [PMID: 37687472 PMCID: PMC10488487 DOI: 10.3390/ma16175779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/13/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023]
Abstract
Ion-selective electrodes are a popular analytical tool useful in the analysis of cations and anions in environmental, industrial and clinical samples. This paper presents an overview of new materials used for the preparation of anion-sensitive ion-selective electrodes during the last five years. Design variants of anion-sensitive electrodes, their advantages and disadvantages as well as research methods used to assess their parameters and analytical usefulness are presented. The work is divided into chapters according to the type of ion to which the electrode is selective. Characteristics of new ionophores used as the electroactive component of ion-sensitive membranes and other materials used to achieve improvement of sensor performance (e.g., nanomaterials, composite and hybrid materials) are presented. Analytical parameters of the electrodes presented in the paper are collected in tables, which allows for easy comparison of different variants of electrodes sensitive to the same ion.
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Affiliation(s)
- Cecylia Wardak
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland;
| | - Klaudia Morawska
- Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin, Poland;
| | - Karolina Pietrzak
- Department of Food and Nutrition, Medical University of Lublin, 4a Chodzki Str., 20-093 Lublin, Poland;
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Eldeeb MA, Dhamu VN, Paul A, Muthukumar S, Prasad S. Electrochemical Soil Nitrate Sensor for In Situ Real-Time Monitoring. MICROMACHINES 2023; 14:1314. [PMID: 37512625 PMCID: PMC10383600 DOI: 10.3390/mi14071314] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/15/2023] [Accepted: 06/24/2023] [Indexed: 07/30/2023]
Abstract
Sustainable agriculture is the answer to the rapid rise in food demand which is straining our soil, leading to desertification, food insecurity, and ecosystem imbalance. Sustainable agriculture revolves around having real-time soil health information to allow farmers to make the correct decisions. We present an ion-selective electrode (ISE) electrochemical soil nitrate sensor that utilizes electrochemical impedance spectroscopy (EIS) for direct real-time continuous soil nitrate measurement without any soil pretreatment. The sensor functionality, performance, and in-soil dynamics have been reported. The ion-selective electrode (ISE) is applied by drop casting onto the working electrode. The study was conducted on three different soil textures (clay, sandy loam, and loamy clay) to cover the range of the soil texture triangle. The non-linear regression models showed a nitrate-dependent response with R2 > 0.97 for the various soil textures in the nitrate range of 5-512 ppm. The validation of the sensor showed an error rate of less than 20% between the measured nitrate and reference nitrate for multiple different soil textures, including ones that were not used in the calibration of the sensor. A 7-day-long in situ soil study showed the capability of the sensor to measure soil nitrate in a temporally dynamic manner with an error rate of less than 20%.
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Affiliation(s)
- Mohammed A Eldeeb
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, USA
| | | | - Anirban Paul
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, USA
| | | | - Shalini Prasad
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, USA
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Wang D, Zhang W, Wang J, Li X, Liu Y. A high-performance, all-solid-state Na + selective sensor printed with eco-friendly conductive ink. RSC Adv 2023; 13:16610-16618. [PMID: 37287809 PMCID: PMC10242244 DOI: 10.1039/d3ra01410j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 05/29/2023] [Indexed: 06/09/2023] Open
Abstract
In recent years, the integration of flexible printed electronics and electrochemical sensors has emerged as a new approach for developing wearable biochemical detecting devices. Among the materials utilized in flexible printed electronics, carbon-based conductive inks are considered to be crucial. In this study, we propose a cost-effective, highly conductive, and environmentally friendly ink formulation utilizing graphite and carbon black (CB) as conductive fillers, resulting in a very low sheet resistance of 15.99 Ω sq-1 (conductivity of 2.5 × 103 S m-1) and a printed film thickness of 25 μm. The unique "sandwich" structure of the working electrode (WE) printed with this ink enhances its electrical conductivity, leading to high sensitivity, selectivity, and stability, with almost no water film generated between the WE and the ion-selective membrane (ISM), strong ion selectivity, long-term stability, and anti-interference. The lower detection limit of the sensor for Na+ is 0.16 mM with a slope of 75.72 mV per decade. To validate the sensor's usability, we analyzed three sweat samples collected during physical activity, with Na+ concentrations within the typical range for human sweat (51 ± 4 mM, 39 ± 5 mM, and 46 ± 2 mM).
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Affiliation(s)
- Dengke Wang
- College of Chemical Engineering and Technology, Taiyuan University of Technology Taiyuan Shanxi 030024 China
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology Taiyuan Shanxi 030024 China
| | - Wanggang Zhang
- College of Materials Science and Engineering, Taiyuan University of Technology Taiyuan Shanxi 030024 China
| | - Jian Wang
- College of Materials Science and Engineering, Taiyuan University of Technology Taiyuan Shanxi 030024 China
| | - Xiaohong Li
- College of Chemical Engineering and Technology, Taiyuan University of Technology Taiyuan Shanxi 030024 China
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology Taiyuan Shanxi 030024 China
| | - Yiming Liu
- College of Materials Science and Engineering, Taiyuan University of Technology Taiyuan Shanxi 030024 China
- Shanxi Academy of Analytical Sciences Taiyuan 030006 Shanxi China
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Kamarozaman NS, Zainal N, Rosli AB, Zulkefle MA, Nik Him NR, Abdullah WFH, Herman SH, Zulkifli Z. Highly Sensitive and Selective Sol-Gel Spin-Coated Composite TiO 2-PANI Thin Films for EGFET-pH Sensor. Gels 2022; 8:690. [PMID: 36354598 PMCID: PMC9689030 DOI: 10.3390/gels8110690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/12/2022] [Accepted: 10/19/2022] [Indexed: 10/15/2023] Open
Abstract
A highly selective and sensitive EGFET-pH sensor based on composite TiO2-PANI had been developed in this work. A sol-gel titanium dioxide (TiO2) and the composite of TiO2 with semiconducting polyaniline (PANI) were deposited using a simple spin-coating method on an indium tin oxide (ITO) substrate. The films have been explored as a sensing electrode (SE) of extended gate field-effect transistor (EGFET) for pH applications in the range of pH 2 to 12. The pH sensitivities between TiO2, TiO2-PANI bilayer composite, and TiO2-PANI composite thin films were discussed. Among these, the TiO2-PANI composite thin film showed a super-Nernstian behavior with high sensitivity of 66.1 mV/pH and linearity of 0.9931; good repeatability with a standard deviation of 0.49%; a low hysteresis value of 3 mV; and drift rates of 4.96, 5.54, and 3.32 mV/h in pH 4, 7, and 10, respectively, for 6 h. Upon applying the TiO2-PANI composite as the SE for nitrate measurement, low sensitivity of 12.9 mV/dec was obtained, indicating that this film is a highly selective sensing electrode as a pH sensor. The surface morphology and crystallinity of the thin films were also discussed.
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Affiliation(s)
- Nur Syahirah Kamarozaman
- Integrated Sensors Research Group, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
- NANO-ElecTronic Centre, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
| | - Nurbaya Zainal
- Integrated Sensors Research Group, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
- NANO-ElecTronic Centre, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
| | - Aimi Bazilah Rosli
- Integrated Sensors Research Group, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
- NANO-ElecTronic Centre, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
| | - Muhammad Alhadi Zulkefle
- Integrated Sensors Research Group, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
- NANO-ElecTronic Centre, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
| | - Nik Raikhan Nik Him
- Integrated Sensors Research Group, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
| | - Wan Fazlida Hanim Abdullah
- Integrated Sensors Research Group, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
| | - Sukreen Hana Herman
- Integrated Sensors Research Group, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
- Microwave Research Institute, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
| | - Zurita Zulkifli
- NANO-ElecTronic Centre, School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA (UiTM), Shah Alam 40450, Selangor, Malaysia
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