Abstract
Using method of moment, the calculating model of electric current distributing and scattered electric field for carbon nanofibers is established in this paper. Based on it, the expression of absorption cross section, scattering cross section and extinction cross section are got. The relationship between infrared extinction cross section of carbon nanofiber and electrical conductivity is analyzed and calculated by using Matlab. The results show that the infrared extinction cross section increases with electrical conductivity increase and peak value appeares when wavelength is longer than the length of carbon nanofiber. The electrical conductivity on peak value is related to wavelength.
Highlights
Smoke is a simple and effectual means of laser passive interference, and the infrared smoke materials should be taken on the better infrared extinction capability
Carbon nanofiber is a new kind of materials with good capability of electromagnetic wave absorption
The induced current inside carbon nanofiber is uniform distribution along the axisl direction and no component is in radial direction
Summary
Smoke is a simple and effectual means of laser passive interference, and the infrared smoke materials should be taken on the better infrared extinction capability. Carbon nanofiber is a new kind of materials with good capability of electromagnetic wave absorption. It has the characteristic of common gas phase growth carbon fiber, and has the characteristic of low density, high electrical conductivity, large specific surface and high specific intensity. The length and wavelength of carbon nanofiber is the same order. It can generate scattering attenuation, and absorption attenuation. Carbon nanofiber has been a new kind of infrared smoke interference materials. To explore the applications of carbon nanofibers in passive interference by smoke screen, the integral equation of induced cueernt for carbon nanofibers is established based the electromagnetic field theory
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