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Поглощение электромагнитного излучения инфракрасного и радио диапазона цилиндрической анизотропной наночастицей малого размера

выпускная квалификационная работа бакалавра

Поглощение электромагнитного излучения инфракрасного и радио диапазона цилиндрической анизотропной наночастицей малого размера

Abstract

Данная работа посвящена исследованию рассеяния и поглощения электромагнитной волны радиодиапазона и инфракрасного диапазона цилиндрической анизатропной наночастицей. Задачи, которые решались в ходе исследования: 1. Разработка физической модели взаимодействия цилиндрических анизотропных частиц с электромагнитным излучением в радио и инфракрасном спектрах излучения; 2. Компьютерное моделирование поглощения и рассеяния электромагнитного излучения радио и инфракрасного диапазона цилиндрической анизотропной частицей и системой этих частиц; 3. Обоснование эффективности применения цилиндрических анизотропных частиц в композитных материалах в стелс технологиях. Были рассмотрены свойства поглощения электромагнитных волн радио диапазона различными композитными радиопоглощающими материалами и покрытиями, в том числе и с углеродными нанотрубками. Была разработанан модель углеродной нанотрубки и расчитаны сечения рассеяния и сечения поглощения электромагнитной волны одной углеродной нанотрубкой и системой углеродных нанотрубок, состоящей из двух анизотропных цилиндреческих наночастиц, оси симметрии которых параллельны друг другу. Расчет сечений рассеяния и сечений поглощения электромагнитной волны проводился методом моделирования discrete dipole approximation (DDA) с помощью програмного обеспечения MATLAB. В результате были получены зависимости сечений рассеяния и сечений поглощения электромагнинтой волны от её частоты для одной углеродной нанотрубки и для двух взаимодействующих нанотрубок. Были проанализированы зависимости сечений рассеяния и сечений поглощения от длины углеродной нанотрубки для одной наночастицы и от расстояния между нанотрубками для двух взаимодействующих наночастиц.

This work is devoted to the study of scattering and absorption of the electromagnetic wave of the radio range and infrared range by a cylindrical anisotropic nanoparticle. Tasks that were solved during the study: 1. Development of a physical model for the interaction of cylindrical anisotropic particles with electromagnetic radiation in the radio and infrared radiation spectra; 2. Computer simulation of absorption and scattering of electromagnetic radiation of radio and infrared by a cylindrical anisotropic particle and a system of these particles; 3. Justification of the effectiveness of the use of cylindrical anisotropic particles in composite materials in stealth technologies. The properties of absorbing electromagnetic waves, as well as various radar absorbing materials and coatings, including those with carbon nanotubes, were considered. A carbon nanotube model was developed and the scattering and electromagnetic absorption cross sections of a single carbon nanotube and a carbon nanotube system consisting of two anisotropic cylinders whose symmetry axes are parallel to each other were calculated. The scattering cross sections and the absorption cross sections of the electromagnetic wave were calculated using the discrete dipole approximation (DDA) simulation method using MATLAB software. As a result, we obtained the dependences of the scattering cross sections and the absorption cross sections of the electromagnet wave on its frequency for one carbon nanotube and for two interacting nanotubes. The dependences of the scattering and absorption cross sections on the length of a carbon nanotube for one nanoparticle and on the distance between nanotubes for two interacting nanoparticles were analyzed.

Keywords

радиопоглощающие материалы, scattering of electromagnetic waves, carbon nanotubes, absorption of electromagnetic waves, stealth technologies, cylindrical anisotropic nanoparticles, radar absorbing coatings, радиопоглощающие покрытия, стелс-Ñ‚ÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ð¸, radar absorbing materials, углеродные нанотрубки, цилиндрические анизотропные наночастицы, поглощение ÑÐ»ÐµÐºÑ‚Ñ€Ð¾Ð¼Ð°Ð³Ð½Ð¸Ñ‚Ð½Ñ‹Ñ Ð²Ð¾Ð»Ð½, рассеяние ÑÐ»ÐµÐºÑ‚Ñ€Ð¾Ð¼Ð°Ð³Ð½Ð¸Ñ‚Ð½Ñ‹Ñ Ð²Ð¾Ð»Ð½

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Average
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