COMPUTER MODELING OF ELECTROMAGNETIC WAVE SCATTERING BY NANOCOMPOSITES CONSIDERING THE AGGREGATION EFFECT

Igor Olenych, Oleh Sinkevych, Yurii Olenych, Olena Aksimentyeva

Abstract


Background. The increase in electromagnetic pollution requires the creation of new materials that can effectively shield radiation and mitigate its negative impact. Special attention is focused on composite materials due to their ability to absorb or scatter radiation. Rayleigh theory makes it possible to predict the intensity of scattered radiation by dispersed media in the case when the particle sizes are much smaller than the wavelength. Considering the possibility of nanoparticle aggregation due to stochastic processes can increase the prediction efficiency.

Model and Implementation Tools. The proposed nanocomposite model has the shape of a cube in which spherical particles of the same radius and volume are randomly arranged. The formation of agglomerates occurred when the distance between the centers of neighboring particles did not exceed their diameter. Additionally, the interaction of particles at a small distance between them, which causes their mutual attraction, was considered. Numerical experiments were implemented in Python using NumPy libraries for vectorized computations and cKDTree for efficient spatial neighbor search.

Results and Discussion. The average values of the number of filler particles of different volumes formed as a result of random aggregation were determined in the range of filler concentrations of 0.1–7% using computational experiments. It was found that the percentage of isolated initial nanoparticles decreases with increasing filler concentration. The largest number of formations contains only two nanoparticles. It was established that the scattering of electromagnetic waves in the IR and radio frequency ranges increases due to the aggregation of nanoparticles. The size and concentration of the initial nanoparticles have different effects on the change in the scattering cross-section. The mutual attraction and coupling of closely spaced particles additionally increase the Rayleigh scattering by dispersed media.

Conclusions. An averaged distribution of the formed agglomerates in a system of spherical nanoparticles by their volume was found as a result of a series of computational experiments. Based on Rayleigh theory, it has been demonstrated that the aggregation of nanoparticles causes an increase in the scattering of electromagnetic waves by dispersed media.

Keywords: Modeling, numerical experiment, dispersed medium, nanoparticle aggregation, Rayleigh scattering.


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References


[1] Cheng, J., Zhang, H., Ning, M., Raza, H., Zhang, D., Zheng, G., Zheng, Q., & Che, R. (2022). Emerging materials and designs for low- and multi-band electromagnetic wave absorbers: the search for dielectric and magnetic synergy? Adv. Funct. Mater., 32(23), 2200123. https://doi.org/10.1002/adfm.202200123

[2] Shu, J. C., Cao, M. S., Zhang, Y. L., & Cao, W. Q. (2023). Heterodimensional structure switching multispectral stealth and multimedia interaction devices. Adv. Sci., 10(26), 2302361. https://doi.org/10.1002/advs.202302361

[3] Cao, M. S., Shu, J. C., Wang, X. X., Wang, X., Zhang, M., Yang, H. J., Fang, X. Y., & Yuanet, J. (2019). Electronic structure and electromagnetic properties for 2D electromagnetic functional materials in gigahertz frequency. Ann. Phys., 531(4), 1800390. https://doi.org/10.1002/andp.201800390

[4] Alegaonkar, A. P., Baskey, H. B., & Alegaonkar, P. S. (2022). Microwave scattering parameters of ferro–nanocarbon composites for tracking range countermeasures. Mater. Adv., 3, 1660-1672. https://doi.org/10.1039/D1MA00977J

[5] Jayalakshmi, C. G., Inamdar, A., Anand, A., & Kandasubramanian, B. (2019). Polymer matrix composites as broadband radar absorbing structures for stealth aircrafts. J. Appl. Polym. Sci., 136(14), 47241. https://doi.org/10.1002/app.47241

[6] Cheng J. Y., Zhang H. B., Xiong Y. F., Gao L. F., Wen B., Raza, H., Wang, H., Zheng, G., Zhang, D., & Zhang, H. (2021). Construction of multiple interfaces and dielectric/magnetic heterostructures in electromagnetic wave absorbers with enhanced absorption performance: a review. J. Materiomics, 7(6), 1233–1263. https://doi.org/10.1016/j.jmat.2021.02.017

[7] Folgueras, L. C., Alves, M. A., & Rezende, M. C. (2010). Microwave absorbing paints and sheets based on carbonyl iron and polyaniline: measurement and simulation of their properties. Journal of Aerospace Technology and Management, 2, 63-70. https://doi.org/10.5028/jatm.2010.02016370

[8] Yadav A., Tripathi, K. C., Baskey H. B., & Alegaonkar P. S. (2022). Microwave scattering behaviour of carbon black/ molybdenum di sulphide /cobalt composite for electromagnetic interference shielding application. Materials Chemistry and Physics, 279, 125766. https://doi.org/10.1016/j.matchemphys.2022.125766

[9] Joshi, A., Bajaj, A., Singh, R., Alegaonkar, P. S., Balasubramanian, K., & Datar, S. (2013). Graphene nanoribbon–PVA composite as EMI shielding material in the X band. Nanotechnology, 24, 455705. https://doi.org/10.1088/0957-4484/24/45/455705

[10] Wang, Y., Chen, Y. B., Wu, X. M., Zhang, W. Z., Luo, C. Y., & Li, J. (2018). Fabrication of MoS2-graphene modified with Fe3O4 particles and its enhanced microwave absorption performance. Adv. Powder Technol. 29(3), 744–750. https://doi.org/10.1016/j.apt.2017.12.016

[11] Cheng, J., Jin, Y., Zhao, J., Jing, Q., Gu, B., Wei, J., Yi, S., Li, M., Nie, W., Qin, Q., Zhang, D., Zheng, G., & Che, R. (2024). From VIB- to VB-Group Transition Metal Disulfides: Structure Engineering Modulation for Superior Electromagnetic Wave Absorption. Nano-Micro Lett. 16, 29. https://doi.org/10.1007/s40820-023-01247-7

[12] Zhang, W., Zhang, X., Wu, H., Yan, H., & Qi, S. (2018). Impact of morphology and dielectric property on the microwave absorbing performance of MoS2-based materials. J. Alloys Compd. 751, 34–42. https://doi.org/10.1016/j.jallcom.2018.04.111

[13] Torquato, S., & Kim, J. (2021). Nonlocal Effective Electromagnetic Wave Characteristics of Composite Media: Beyond the Quasistatic Regime. Phys. Rev. X, 11, 021002. https://doi.org/10.1103/PhysRevX.11.021002

[14] Kong, M., Cao, X. Y., Qi, Q., & Wu, X. L. (2025). An effective solution for analyzing the electromagnetic scattering characteristics of composite conducting dielectric objects under multiple angle incidence. Sci. Rep., 15, 26844. https://doi.org/10.1038/s41598-025-11786-1

[15] Sarkar T. K. & Jung B. H. (2004). Analysis of Scattering From Arbitrarily Shaped 3-D Conducting/Dielectric Composite Objects Using a Combined Field Integral Equation. Journal of Electromagnetic Waves and Applications, 18(6), 729-743. http://dx.doi.org/10.1163/156939304323105826

[16] Olenych, Y., Karbovnyk, I., & Klym, H. (2018). Computer simulation of field-controlled percolation in 3D system of straight nanotubes. XIV-th International Conference on Perspective Technologies and Methods in MEMS Design (MEMSTECH), pp. 48-51. https://doi.org/10.1109/MEMSTECH.2018.8365699




DOI: http://dx.doi.org/10.30970/eli.32.13

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