Synthesis of Zinc Oxide Nanoparticles via Sol-Gel Method, Characterisation, and Dielectric Analysis
Keywords:
Keywords: Zinc oxide, capacitance, dielectric loss, electrical conductivity.Abstract
Zinc oxide (ZnO) nanoparticles were synthesised by a sol-gel/precipitation method. The synthesised ZnO nanoparticles were characterised by employing scanning electron microscopy (SEM), photoluminescence, and X-ray diffraction (XRD) techniques. Emission in the UV region was observed in the photoluminescence of the ZnO nanoparticles. Dielectric spectroscopy of the synthesised ZnO nanoparticle pellets was examined over a broad frequency range from 0.1 to 10^5 Hz. The capacitance of the ZnO nanoparticles decreases continuously with frequency because the dipoles receive less time to align in the field. The frequency variation of the dielectric loss of the ZnO pellets was studied. The electrical conductivity of the ZnO nanoparticles increases exponentially with frequency. The electrical conductivity and capacitance of ZnO are found to be strongly dependent on pellet thickness and on the frequency range, as revealed by the dielectric investigations.
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[1] Parashar, M., Shukla, V., & Singh, R. (2020). Metal oxide nanoparticles via sol–gel method: A review on synthesis, characterisation and applications. Journal of Materials Science: Materials in Electronics, 31, 3729–3749. https://doi.org/10.1007/s10854-020-02994-8
[2] Zhu, C., & Wang, X. (2025). Nanomaterial ZnO synthesis and its photocatalytic applications: A review. Nanomaterials, 15. https://doi.org/10.3390/nano15090682
[3] Raha, S., & Ahmaruzzaman, M. (2022). ZnO nanostructured materials and their potential applications: Progress, challenges and perspectives. Nanoscale Advances, 4, 1868–1925. https://doi.org/10.1039/d1na00880c
[4] Yadav, A., Varshan, A., Nayak, S., Wu, J.-Y., & Thanasekaran, P. (2025). Structural, morphological, dielectric and semiconducting properties of ZnO nanoparticles calcined at 500 ^C. RSC Advances, 15, 36749–36759. https://doi.org/10.1039/d5ra06276d
[5] Geldasa, F. T., Kebede, M., Shura, M. W., & Hone, F. G. (2023). Experimental and computational study of metal oxide nanoparticles for the photocatalytic degradation of organic pollutants: a review. RSC Advances, 13, 18404–18442. https://doi.org/10.1039/d3ra01505j
[6] Frey, H., Beck, A., Huang, X., Van Bokhoven, J. V., & Willinger, M. (2022). Dynamic interplay between metal nanoparticles and oxide support under redox conditions. Science, 376, 982–987. https://doi.org/10.1126/science.abm3371
[7] Lee, C.-T. (2010). Fabrication methods and luminescent properties of ZnO materials for light-emitting diodes. Materials, 3, 2218–2259. https://doi.org/10.3390/ma3042218
[8] Caglar, M., Ilican, S., Caglar, Y., & Yakuphanoglu, F. (2009). Electrical conductivity and optical properties of ZnO nanostructured thin film. Applied Surface Science, 255(8), 4491–4496.
[9] Shoeb, M., Ahmad, S., Mashkoor, F., Khan, M. N., Hasan, I., Singh, B. R., & Jeong, C. (2024). Investigating the size-dependent structural, optical, dielectric, and photocatalytic properties of benign-synthesised ZnO nanoparticles. Journal of Physics and Chemistry of Solids, 184, 111707. https://doi.org/10.1016/j.jpcs.2023.111707
[10] Pandey, J. C., & Singh, M. (2021). Dielectric polymer nanocomposites: Past advances and future prospects from an electrical insulation perspective. SPE Polymers, 2(4), 236–256.
[11] G"uell, F., Gald'aenez-Mart'inez, A., Mart'inez-Alanis, P. R., Catto, A., Da Silva, L. F., Mastelaro, V., Santana, G., & Dutt, A. (2023). ZnO-based nanomaterials approach for photocatalytic and sensing applications: Recent progress and trends. Materials Advances. https://doi.org/10.1039/d3ma00227f
[12] Zubkins, M., Gabrusenoks, J., Chikvaidze, G., Aulika, I., Butikova, J., Kalendarev, R., & Bikse, L. (2020). Amorphous ultra-wide bandgap ZnO_x thin films deposited at cryogenic temperatures. Journal of Applied Physics. https://doi.org/10.1063/5.0028901
[13] Pandey, J. K. (2025). The impact of electromagnetic and optical radiation on physical and biological systems. Journal of Nano- and Electronic Physics, 17(5), 05023. https://doi.org/10.21272/jnep.17(5).05023
[14] Maruthupandy, M., Anand, M., Maduraiveeran, G., Suresh, S., Beevi, A. H., & Priya, R. (2016). Investigation on the electrical conductivity of ZnO nanoparticles-decorated bacterial nanowires. Advances in Natural Sciences: Nanoscience and Nanotechnology, 7. https://doi.org/10.1088/2043-6262/7/4/045011
[15] Maafa, I. M. (2025). Potential of zinc oxide nanostructures in biosensor application. Biosensors, 15. https://doi.org/10.3390/bios15010061
[16] Tsuzuki, T. (2021). Mechanochemical synthesis of metal oxide nanoparticles. Communications Chemistry, 4. https://doi.org/10.1038/s42004-021-00582-3
[17] Pandey, J. K., & Kumar, R. (2025). Governing the algorithmic agent: Confronting overt and covert challenges to justice and the future of work. International Journal of Law Management & Humanities, 8(4), 1974–1984. https://doij.org/10.10000/IJLMH.1110648
[18] Hasnidawani, J. N., Azlina, H., Norita, H., Bonnia, N. N., Ratim, S., & Ali, E. S. (2016). Synthesis of ZnO nanostructures using sol-gel method. Procedia Chemistry, 19, 211–216. https://doi.org/10.1016/j.proche.2016.03.095
[19] Schönhals, A., & Kremer, F. (2003). Analysis of dielectric spectra. In Broadband Dielectric Spectroscopy.
[20] Yedurkar, S., Maurya, C., & Mahanwar, P. (2016). Biosynthesis of zinc oxide nanoparticles using Ixora coccinea leaf extract–-A green approach. Open Journal of Synthesis Theory and Applications, 5(1), 1–14.
[21] Katan, C., Mercier, N., & Even, J. (2019). Quantum and dielectric confinement effects in lower-dimensional hybrid perovskite semiconductors. Chemical Reviews, 119(5), 3140–3192. https://doi.org/10.1021/acs.chemrev.8b00417
[22] Zhang, Z.-Y., & Xiong, H. (2015). Photoluminescent ZnO nanoparticles and their biological applications. Materials, 8, 3101–3127. https://doi.org/10.3390/ma8063101
[23] Serrano-L'azaro, A., Portillo-Cortez, K., De La Mora Mojica, M. B., & Dur'an-'Alvarez, J. (2025). A review on ZnO nanostructures for optical biosensors: Morphology, immobilisation strategies, and biomedical applications. Nanomaterials, 15. https://doi.org/10.3390/nano15211627
[24] Rodrigues, J., Sedrine, N. B., Correia, M., & Monteiro, T. (2020). Photoluminescence investigations of ZnO micro/nanostructures. Materials Today Chemistry. https://doi.org/10.1016/j.mtchem.2020.100243
[25] Alwan, R. M., Kadhim, Q. A., Sahan, K. M., Ali, R. A., Mahdi, R. J., Kassim, N. A., & Jassim, A. N. (2015). Synthesis of zinc oxide nanoparticles via sol–gel route and their characterisation. Nanosci. Nanotechnol., 5(1), 1–6. https://doi.org/10.5923/j.nn.20150501.01
[26] Onu, C. P., Ekpunobi, A., Ozobialu, A. L., Okafor, C., Jeroh, D. M., Muomeliri, C. B., & Onu, C. (2024). Structural, optical, magnetic and electrical properties of zinc oxide doped with iron: A review. Asian Journal of Physical and Chemical Sciences. https://doi.org/10.9734/ajopacs/2024/v12i4234
[27] Zhou, Y., Xu, L., Wu, J., Zhu, W., He, T., Yang, H., & Kang, Z. (2023). The operation active sites of O2 reduction to H2O2 over ZnO. Energy & Environmental Science, 16(8), 3526–3533.
[28] Sahu, J., Kumar, S., Ahmed, F., Alvi, P. A., Dalela, B., Phase, D., Gupta, M., & Dalela, S. (2023). Electrochemical and electronic structure properties of high-performance supercapacitor based on Nd-doped ZnO nanoparticles. Journal of Energy Storage. https://doi.org/10.1016/j.est.2022.106499
[29] Kaur, D., Sharma, T., & Madhu, C. (2022). Dielectric investigations of pristine and modified ZnO nanoparticles for energy storage devices. Journal of Materials Science: Materials in Electronics, 33, 9905–9917. https://doi.org/10.1007/s10854-022-07979-3
[30] Miller Jr, P. H. (1941). The electrical conductivity of zinc oxide. Physical Review, 60(12), 890.
[31] Chaari, M., & Matoussi, A. (2012). Electrical conduction and dielectric studies of ZnO pellets. Physica B: Condensed Matter, 407(17), 3441–3447.
[32] Marcillo, F., Villamagua, L., & Stashans, A. (2017). Analysis of electrical and magnetic properties of zinc oxide: A quantum mechanical study. International Journal of Modern Physics B, 31(14), 1750111.
[33] Jay Kumar Pandey et al. “Colorimetric Detection of Deltamethrin Pesticide from Biological Samples
based on the Peroxidase-mimic Catalytic Activity on MnO2/SnO2” Key Engineering Materials, Vol.
928, Page 45-51, https://doi.org/10.4028/p-4ti1i0
[34] Pandey, J. K. (2025). The impact of electromagnetic and optical radiation on physical and biological systems. Journal of Nano- and Electronic Physics, 17(5), 05023. https://doi.org/10.21272/jnep.17(5).05023
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