Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film Semiconductors
Dissolved oxygen (DO) is a crucial parameter in water quality monitoring because it directly affects the health of aquatic ecosystems. This study explored electrodeposited Cu<sub>2</sub>O thin-film semiconductors for DO sensing. Cu<sub>2</sub>O was chosen for its low cost, ec...
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2025-02-01
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| author | H. E. Wijesooriya J. A. Seneviratne K. M. D. C. Jayathilaka W. T. R. S. Fernando P. L. A. K. Piyumal A. L. A. K. Ranaweera S. R. D. Kalingamudali L. S. R. Kumara O. Seo O. Sakata R. P. Wijesundera |
| author_facet | H. E. Wijesooriya J. A. Seneviratne K. M. D. C. Jayathilaka W. T. R. S. Fernando P. L. A. K. Piyumal A. L. A. K. Ranaweera S. R. D. Kalingamudali L. S. R. Kumara O. Seo O. Sakata R. P. Wijesundera |
| author_sort | H. E. Wijesooriya |
| collection | DOAJ |
| description | Dissolved oxygen (DO) is a crucial parameter in water quality monitoring because it directly affects the health of aquatic ecosystems. This study explored electrodeposited Cu<sub>2</sub>O thin-film semiconductors for DO sensing. Cu<sub>2</sub>O was chosen for its low cost, eco-friendliness, and non-toxic nature. Cu<sub>2</sub>O films were electrodeposited on titanium (Ti) substrates using an acetate bath (0.1 M sodium acetate and 0.01 M cupric acetate) at −200 mV versus Ag/AgCl for 30 min, with a bath temperature of 55 °C, stirred at 50 rpm. The bath pH was systematically adjusted from 5.8 to 6.8 in 0.2 steps using NaOH and Acetic acid. A range of analyses including synchrotron X-ray diffraction (SXRD), scanning electron microscopy (SEM), surface wettability, capacitance–voltage (C-V), Raman spectroscopy, Fourier-transform infrared (FTIR) spectrum, and Electrochemical Impedance Spectroscopy (EIS) was performed to assess their properties and sensing performance. The results showed that Cu<sub>2</sub>O films deposited at pH 6.4 exhibited optimal performance for DO sensing, with a strong linear response, marking this pH, deposition time, and temperature as ideal for creating effective DO sensors. This study introduces a novel, cost-effective approach to dissolved oxygen sensing using electrodeposited n-Cu<sub>2</sub>O thin-film semiconductors, marking the first application of this material in such sensors and showcasing its potential for scalable and environmentally sustainable sensing technologies. |
| format | Article |
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| issn | 2673-7167 |
| language | English |
| publishDate | 2025-02-01 |
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| spelling | doaj-art-9df1d2fd086542ed9d71b1ba6b847bfa2025-08-20T01:48:53ZengMDPI AGPhyschem2673-71672025-02-0151610.3390/physchem5010006Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film SemiconductorsH. E. Wijesooriya0J. A. Seneviratne1K. M. D. C. Jayathilaka2W. T. R. S. Fernando3P. L. A. K. Piyumal4A. L. A. K. Ranaweera5S. R. D. Kalingamudali6L. S. R. Kumara7O. Seo8O. Sakata9R. P. Wijesundera10Department of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaDepartment of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaDepartment of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaDepartment of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaDepartment of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaDepartment of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaDepartment of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaCenter for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198, Hyogo, JapanCenter for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198, Hyogo, JapanCenter for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun 679-5198, Hyogo, JapanDepartment of Physics & Electronics, Faculty of Science, University of Kelaniya, Kelaniya 11600, Sri LankaDissolved oxygen (DO) is a crucial parameter in water quality monitoring because it directly affects the health of aquatic ecosystems. This study explored electrodeposited Cu<sub>2</sub>O thin-film semiconductors for DO sensing. Cu<sub>2</sub>O was chosen for its low cost, eco-friendliness, and non-toxic nature. Cu<sub>2</sub>O films were electrodeposited on titanium (Ti) substrates using an acetate bath (0.1 M sodium acetate and 0.01 M cupric acetate) at −200 mV versus Ag/AgCl for 30 min, with a bath temperature of 55 °C, stirred at 50 rpm. The bath pH was systematically adjusted from 5.8 to 6.8 in 0.2 steps using NaOH and Acetic acid. A range of analyses including synchrotron X-ray diffraction (SXRD), scanning electron microscopy (SEM), surface wettability, capacitance–voltage (C-V), Raman spectroscopy, Fourier-transform infrared (FTIR) spectrum, and Electrochemical Impedance Spectroscopy (EIS) was performed to assess their properties and sensing performance. The results showed that Cu<sub>2</sub>O films deposited at pH 6.4 exhibited optimal performance for DO sensing, with a strong linear response, marking this pH, deposition time, and temperature as ideal for creating effective DO sensors. This study introduces a novel, cost-effective approach to dissolved oxygen sensing using electrodeposited n-Cu<sub>2</sub>O thin-film semiconductors, marking the first application of this material in such sensors and showcasing its potential for scalable and environmentally sustainable sensing technologies.https://www.mdpi.com/2673-7167/5/1/6Cu<sub>2</sub>Odissolved oxygenelectrodepositionbath pHsurface morphology |
| spellingShingle | H. E. Wijesooriya J. A. Seneviratne K. M. D. C. Jayathilaka W. T. R. S. Fernando P. L. A. K. Piyumal A. L. A. K. Ranaweera S. R. D. Kalingamudali L. S. R. Kumara O. Seo O. Sakata R. P. Wijesundera Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film Semiconductors Physchem Cu<sub>2</sub>O dissolved oxygen electrodeposition bath pH surface morphology |
| title | Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film Semiconductors |
| title_full | Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film Semiconductors |
| title_fullStr | Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film Semiconductors |
| title_full_unstemmed | Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film Semiconductors |
| title_short | Cost-Effective Method for Dissolved Oxygen Sensing with Electrodeposited n-Cu<sub>2</sub>O Thin-Film Semiconductors |
| title_sort | cost effective method for dissolved oxygen sensing with electrodeposited n cu sub 2 sub o thin film semiconductors |
| topic | Cu<sub>2</sub>O dissolved oxygen electrodeposition bath pH surface morphology |
| url | https://www.mdpi.com/2673-7167/5/1/6 |
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