ECO FRIENDLY FABRICATION OF CUO/PVP THIN FILM HUMIDITY SENSORS VIA OLIVE LEAF ASSISTED GREEN SYNTHESIS AND ULTRASONIC SPRAY DEPOSITION

Shahed A. Dheyab

Авторы

Shahed A. Dheyab Department of Physics, College of Education for Pure Sciences, Tikrit University, Tikrit, IRAQ

Ключевые слова:

copper oxide (CuO), Green synthesis, Olive leaf extract, Polyvinylpyrrolidone, Humidity sensor

Аннотация

This work is a low-cost and sustainable new strategy for the green synthesis of CuO/poly (vinylpyrrolidone) (PVP) thin film humidity sensors based on OLE-derived copper oxide, namely CuO nanoparticle. Ultrasonic spray coating of the sensing films on gold interdigitated electrodes (IDEs) This work investigates the effect of calcination temperature (200 and 300°C) and polyvinylpyrrolidone (PVP) concentration (0.10 and 0.50 wt.% PVP-to-oxides mass ratio ATONY) on phase formation, morphological characteristics as well dispersion stability ontario casino lottery winner This study examined effect (up to 50%) on structural, morphological and sensing properties of the material. X-ray diffraction confirmed the formation of phase-pure monoclinic CuO with enhanced crystallinity at higher calcination temperature, while FESEM analysis revealed porous and interconnected nanostructures favorable for water adsorption and charge transport. The sensors exhibited a typical resistive humidity sensing behavior, with a continuous decrease in resistance over the 11-85% relative humidity (RH) range and linear I-V characteristics indicating good ohmic contact. S2 (200 °C, 0.50 wt. % PVP) showed good sensing performance, with a sensitivity of 330%, short response and recovery times (10 s/12 s). The sensors also showed impressive repeatability (RSD < 2.3%, among the two cycles), low hysteresis (< 4%), and stable long-term performance over a period of up to thirty days, showing promise for application as body motion monitors.

Библиографические ссылки

Gong, Xue, et al. "Recent progress on screen-printed flexible sensors for human health monitoring." Sensors and Actuators A: Physical 345 (2022): 113821.

Abdullah, Muatazbullah Ibrahim, Adnan R. Ahmad, and Ameer F. Abdulameer. "Fabrication and Characterization of Humidity Sensors Based on PEDOT: PSS Doped with Gold and Silver Nanoparticles by Laser Ablation." International Journal of Nanoscience 22.05 (2023): 2350038.

Dutta, Taposhree, et al. "Road map of semiconductor metal-oxide-based sensors: a review." Sensors23.15 (2023): 6849.

Bonthula, Sumalatha, et al. "Recent advances in copper-based materials for sustainable environmental applications." Sustainable Chemistry 4.3 (2023): 246-271.

Eid, Salah, et al. "Surface, electrochemical, and theoretical investigation on utilizing olive leaf extract as green inhibitor for copper corrosion in alkaline environment." Arabian Journal for Science and Engineering49.1 (2024): 147-164.

Sportelli, Maria Chiara, et al. "Green Synthesis and Analytical Characterization of Core-Shell Copper Sub-Microparticles." Chemistry–A European Journal 29.20 (2023): e202203510.

Pandiyarajan, Sabarison, et al. "High-performance polyvinylpyrrolidone capped copper coatings via ultrasonic-assisted supercritical-CO2 electrodeposition: electrochemical evaluation." Surface and Coatings Technology 409 (2021): 126926.

Abdelrazek, E. M., et al. "Physical properties of copper oxide nano-composite incorporated PVP/chitosan blend matrix by casting method." Polymer Bulletin 81.8 (2024): 7467-7479.

El-Kader, MFH Abd, et al. "Nanocomposite of PVA/PVP blend incorporated by copper oxide nanoparticles via nanosecond laser ablation for antibacterial activity enhancement." Polymer Bulletin 79.11 (2022): 9779-9795.

Hashim, Fouad Sh, et al. "Microstructure, optical, and antibacterial features of PVP/Cu2O electrospun nanofibers for optoelectronics and biological purposes." Journal of Inorganic and Organometallic Polymers and Materials 34.11 (2024): 5342-5350.

Baqer, Anwar Ali, et al. "Copper oxide nanoparticles synthesized by a heat treatment approach with structural, morphological and optical characteristics." Journal of Materials Science: Materials in Electronics 29.2 (2018): 1025-1033.

Bhunia, Amit Kumar, et al. "Negative photoconductivity: optical and structural characterization of PVP encapsulated CuO nanorods for the study of negative photoconductivity effect." The European Physical Journal Plus 138.7 (2023): 613.

Khan, Hizb Ullah, et al. "The efficacy of polyvinylpyrrolidone (PVP)/CuO nanocomposite as an appropriate room temperature humidity sensing material: fabrication of highly sensitive capacitive resistive type humidity sensor." Journal of Materials Science: Materials in Electronics 31.10 (2020): 7698-7707.

Wang, Jingyu, and Wen Zeng. "Research Progress on Humidity-Sensing Properties of Cu-Based Humidity Sensors: a Review." Journal of Sensors 2022.1 (2022): 7749890.

Dasgupta, Debadrita, et al. "Proton exchange assisted charge conduction and enhanced humidity sensitivity of polyvinyl pyrrolidone incorporated polyaniline." Synthetic Metals 312 (2025): 117858.

Abdel-Hamed, M. O., et al. "Effect of plasma pretreatment and graphene oxide ratios on the transport properties of PVA/PVP membranes for fuel cells." Scientific Reports 14.1 (2024): 1092.

K. Malook, H. Khan, M. Ali, and H. Ihsan Ul, “Investigation of room temperature humidity sensing performance of meso?porous CuO particles,” Materials Science in Semiconductor Processing, 113, (2020);105021.

M. P. Rupashree, K. Soppin, S. Pratibha, and B. Chethan, “Cost effective photocatalytic and humidity sensing performance of green tea mediated copper oxide nanoparticles,” Inorganic Chemistry Communications, 134, (2021); 108974

S. B. Wang, C. H. Hsiao, S. J. Chang et al., “CuO nanowirebased humidity sensor,” IEEE Sensors Journal, 12, (2012); 1884–1888

R. Nitta, H. E. Lin, Y. Kubota, T. Kishi, T. Yano, and N. Matsushita, “CuO nanostructure-based flexible humidity sensors fabricated on PET substrates by spin-spray method,” Applied Surface Science, 572, , (2022); 151352

P. M. Perillo and D. F. Rodriguez, “Humidity sensor using Cuo nanorices thin film,” Anales De La Asociacion Fisica Argentina, 32, (2022); 76–82.

H. U. Khan, M. Tariq, M. T. Shah et al., “The efficacy of poly-vinylpyrrolidone (PVP)/CuO nanocomposite as an appropri ate room temperature humidity sensing material: fabrication of highly sensitive capacitive resistive type humidity sensor,” Journal of Materials Science-Materials in Electronics, 31, (2020); 7698–7707

H. El Kari, X. Zhang, H. Enriquez, A. J. Mayne, and H. Oughaddou, “Controlled Surface Assembly and Size-Dependent Electronic Properties of Large C96 Nanographenes on Au(111),” Applied Surface Science (2026).