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| Electrical Properties of Different Gum Arabic Thin Film by Optical Methods |
Nada. Abbas. Ahmad, Sohad. Saad. Elwakeel, Abdelmoneim .M. Awadelgied, Al desogi. Omer Hamed, Abdalsakhi. S. Mohammed
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Abstract:
Syntheses Gum Arabic thin film made by mechanical method. The maximum value of refractive index (n) is (1.588) for all Gum Arabic (Hashaba, Neem and Talha) samples at wavelengths ranged (310 to 325) nm.The normal dielectric constant of all samples at (238 and 288) nm range where the absorption of the samples at these wavelengths is small, the maximum value of rail dielectric constant (?1) equal to (19.22) at wavelength 295 nm for the Hashaba Gum Arabic samples, but for the Neem Gum Arabic samples equal 7.01 at 288 nm wavelength and for the Talha Gum Arabic samples equal 6.14 at the same wavelength (288nm).The high magnitude of optical conductivity (1.679x1015 sec-1) at wavelengths range (303 to 315) nm for all samples confirms the very high photo-response of the 12 samples prepared by Gum Arabic.The maximum value of electrical conductivity for all samples equal 24.3 (?.cm)-1 at wavelengths range (304 to 340) nm.
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