INTEGRATED-ALL SOLID ELECTRODES pH SENSOR PERFORMANCE DEPENDENCY ON SILVER/SILVER CHLORIDE ELECTRODE THICKNESS
DOI:
https://doi.org/10.11113/jurnalteknologi.v87.22362Keywords:
Silver/silver chloride, solid reference electrode, sensitivity, linearity, pH measurementAbstract
Environmental monitoring, biomedical research, and food processing require precise pH measurements; hence pH sensors are important. The glass-based reference electrode (RE) is the most common pH sensor but the fragility of the glass-based RE prevents it from being miniaturized. Thus, an integrated-all solid electrode (IASE) was fabricated where the Ag layer was thermally evaporated, followed by a chlorination process to form an Ag/AgCl RE, and a titanium dioxide (TiO2) thin film was used as the sensing electrode (SE) to form the integrated-all solid electrode (IASE). The influence of silver/silver chloride (Ag/AgCl) thin film electrode thickness (60, 120, 180, 240, and 300 nm) on the electrochemical-based pH sensor was studied. The IASE was applied as the extended-gate of field effect transistor (EGFET). The pH sensor sensitivity and linearity were evaluated for the IASE performance. As a result, the thicker the Ag/AgCl layer the higher the sensitivity. The 300 nm Ag/AgCl thickness showed promising sensitivity and linearity with 67.8 mV/pH and 0.9846, respectively.
References
N. López-Vinent, A. Cruz-Alcalde, J. Giménez, S. Esplugas, and C. Sans. 2021. Improvement of the Photo-Fenton Process at Natural Condition of pH using Organic Fertilizers Mixtures: Potential Application to Agricultural Reuse of Wastewater. Applied Catalysis B: Environmental. 290. Doi: 10.1016/j.apcatb.2021.120066.
Z. Güngör and H. Ozay. 2022. Ultra-fast pH Determination with a New Colorimetric pH-sensing Hydrogel for Biomedical and Environmental Applications. Reactive and Functional Polymers. 180. Doi: 10.1016/j.reactfunctpolym.2022.105398.
S. Liu, X. Cai, J. Huang, Z. Tang, Y. Hu, and Y. Li. 2023. Effects of Environmental pH on Protein Properties and Flavor Factors of Hairtail (Trichiurus haumela) in Thermal Processing. Food Chemistry. 413. Doi: 10.1016/j.foodchem.2023.135615.
O. Smutok and E. Katz. 2023. Recent Insights in Electrochemically Induced pH-change Systems Triggering Payload Release for Biomedical Application. Current Opinion in Electrochemistry. 39: 101290. Doi: 10.1016/j.coelec.2023.101290.
Y. Zou, Y. Sun, W. Shi, B. Wan, and H. Zhang. 2023. Dual-functional Shikonin-loaded Quaternized Chitosan/polycaprolactone Nanofibrous Film with pH-Sensing for Active and Intelligent Food Packaging. Food Chemistry. 399. Doi: 10.1016/j.foodchem.2022.133962.
H. Guo, C. Shao, Y. Ma, Y. Zhang, and P. Lu. 2023. Development of Active and Intelligent pH Food Packaging Composite Films Incorporated with Litchi Shell Extract as an Indicator. International Journal of Biological Macromolecules. 226: 77–89. Doi: 10.1016/j.ijbiomac.2022.11.325.
C. Beale, A. Altana, S. Hamacher, A. Yakushenko, D. Mayer, B. Wolfrum, and A. Offenhäusser. 2022. Inkjet printed Ta2O5 on a Flexible Substrate for Capacitive pH Sensing at High Ionic Strength. Sensors and Actuators B: Chemical. 369. Doi: 10.1016/j.snb.2022.132250.
S. Fierro, R. Seishima, O. Nagano, H. Saya, and Y. Einaga. 2013. In vivo pH Monitoring using boron Doped Diamond Microelectrode and Silver Needles: Application to Stomach Disorder Diagnosis. Scientific Reports. 3: 1–4. Doi: 10.1038/srep03257.
T. M. Huynh, T. S. V. Nguyen, T. C. D. Doan, and C. M. Dang. 2019. Fabrication of Thin Film Ag/AgCl Reference Electrode by Electron Beam Evaporation Method for Potential Measurements. Advances in Natural Sciences: Nanoscience and Nanotechnology. 10: 0–6. Doi: 10.1088/2043-6254/aafe77.
Y. Tian, P. Zhang, K. Zhao, Z. Du, and T. Zhao. 2020. Application of Ag/AgCl Sensor for Chloride Monitoring of Mortar under Dry-Wet Cycles. Sensors (Switzerland). 20. Doi: 10.3390/s20051394.
S. Kim, G. Park, H. J. Ahn, B. U. Yoo, I. H. Song, K. H. Lee, K. H. Kim, J. H. Lim, and J. Y. Lee. 2020. Facial Fabrication and Characterization of Novel Ag/AgCl Chloride Ion Sensor Based on Gel-Type Electrolyte, Frontiers in Chemistry. 8: 1–13. Doi: 10.3389/fchem.2020.574986.
T. M. Pan, Y. H. Huang, J. L. Her, B. S. Lou, and S. T. Pang. 2020. Solution Processed ZnInxOy Sensing Membranes on Flexible PEN for Extended-gate Field-effect Transistor pH Sensors. Journal of Alloys and Compounds. 822. Doi: 10.1016/j.jallcom.2019.153630.
K. Priyalakshmi Devi, P. Goswami, and H. Chaturvedi, 2022. Fabrication of nanocrystalline TiO2 Thin Films using Sol-Gel Spin Coating Technology and Investigation of Its Structural, Morphology and Optical Characteristics. Applied Surface Science. 591: 153226. Doi: 10.1016/j.apsusc.2022.153226.
N. Sharma and R. Kumar. 2022. Effect of Spin Speed on the Properties of TiO2 Thin Films. Materials Today: Proceedings. 62: 6615–6618. Doi: 10.1016/j.matpr.2022.04.614.
S. Saravanan and R. S. Dubey. 2021. Optical and Structural Investigations of TiO2 Multilayers on Glass Prepared via Sol–gel Spin-coating Technique. Materials Today: Proceedings. 49: 2872–2875. Doi: 10.1016/j.matpr.2021.10.129.
K. Albaidani, A. Timoumi, W. Belhadj, S. N. Alamri, and S. A. Ahmed. 2023. Structural, Electronic and Optical Characteristics of TiO2 and Cu-TiO2 Thin Films Produced by Sol-gel Spin Coating. Ceramics International. 49: 36265–36275. Doi: 10.1016/j.ceramint.2023.08.309.
T. Rahman and T. Ichiki. 2017. Fabrication and Characterization of a Stabilized Thin Film Ag/AgCl Reference Electrode Modified with Self-assembled Monolayer of Alkane Thiol Chains for Rapid Biosensing Applications. Sensors (Switzerland). 17. Doi: 10.3390/s17102326.
Z. Xu, L. Han, P. Hu, and S. Dong. 2014. Facile Synthesis of Small Ag@AgCl Nanoparticles via a Vapor Diffusion Strategy and Their Highly Efficient Visible-light-driven Photocatalytic Performance. Catalysis Science and Technology. 4: 3615–3619. Doi: 10.1039/c4cy00889h.
Y. Y. Dong, Y. H. Zhu, M. G. Ma, Q. Liu, and W. Q. He. 2021. Synthesis and Characterization of Ag@AgCl-reinforced Cellulose Composites with Enhanced Antibacterial and Photocatalytic Degradation Properties. Scientific Reports. 11: 1–9. Doi: 10.1038/s41598-021-82447-2.
Y. Jing, Q. Lei, C. Xia, Y. Guan, Y. Yang, J. He, Y. Yang, Y. Zhang, and M. Yan. 2019. Synthesis of Ag and AgCl Co-doped ZIF-8 Hybrid Photocatalysts with Enhanced Photocatalytic Activity through a Synergistic Effect. RSC Advances. 10: 698–704. Doi: 10.1039/c9ra10100d.
O. Cabeza et al. 2021. Strange Behaviour of Transport Properties in Novel Metal Thiocyanate based Ionic Liquids. Journal of Molecular Liquids. 340: 117164. Doi: 10.1016/j.molliq.2021.117164.
M. Al Hadi Zulkefle, S. H. Herman, R. A. Rahman, K. A. Yusof, A. B. Rosli, W. F. Hanim Abdullah, and Z. Zulkifli. 2021. Evaluation on the Egfet ph Sensing Performance of Sol-gel Spin Coated Titanium Dioxide Thin Film. Jurnal Teknologi. 83: 119–125. Doi: 10.11113/jurnalteknologi.v83.16313.
L. Manjakkal, D. Szwagierczak, and R. Dahiya. 2020. Metal Oxides based Electrochemical pH Sensors: Current Progress and future Perspectives. Progress in Materials Science. 109: 100635. Doi: 10.1016/j.pmatsci.2019.100635.
E. Maulana, N. Hidayah, and O. Setyawati. 2018. Titanium Dioxide (TiO2) and Silver Chloride (AgCl)-based pH Sensor using Spin Coating Method. Proceeding - ICAMIMIA 2017: International Conference on Advanced Mechatronics, Intelligent Manufacture, and Industrial Automation, IEEE. 254–259. Doi: 10.1109/ICAMIMIA.2017.8387597.
Tung Son Vinh Nguyen, Tien Minh Huynh, Tin Chanh Duc Doan, and Chien Mau Dang. 2019. Enhanced Electrochemical and Physical Properties of Ag/AgCl Planar Reference Electrodesin Potentiometric Sensors by Graphite Oxide Layer, Journal of Materials Science and Engineering A. 9: 83–90. Doi: 10.17265/2161-6213/2019.3-4.005.
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