Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 81: Poster Focus Session: Molecular Nanostructures on Surfaces - New Concepts towards Complex Architectures

O 81.17: Poster

Mittwoch, 14. März 2018, 18:15–20:30, Poster A

Effects of neutron irradiation on the frequency dependencies of electrical conductivity of nanocrystalline 3C-SiC particles — •Elchin Huseynov — Institute of Radiation Problems of Azerbaijan National Academy of Sciences, AZ 1143, B.Vahabzade 9, Baku, Azerbaijan

Nanocrystalline 3C-SiC have been irradiated by neutron flux up to 20 hours. On the 3C-SiC nanomaterial radiation-induced conductivity (RIC) has been observed after neutron irradiation. From the comparatively analyses of frequency dependence of electrical conductivity at different temperatures it was determined that, numerical value of electrical conductivity increases after neutron irradiation. Numerical value of electrical conductivity of 3C-SiC nanomaterial increases up to 7.5x10-4 S/m or approximately 5.5 times after neutron irradiation. The main reason for RIC is the increase of concentration of carriers in nanocrystalline 3C-SiC after neutron irradiation. It has been determined from interdependence between real and imaginary parts of electrical conductivity that, the real part of electrical conductivity changes more than imaginary part after neutron irradiation. Ionic or dipolar type of conductivity has been found from interdependence between real and imaginary parts of electrical conductivity. Moreover, acceptor or donor defects are known as deep levels are generated in nanomaterial after neutron irradiation. The concentration of donor (n-type donor, 31P) atoms increases as a result of nuclear transformation within neutron irradiation in 3C-SiC nanomaterial and it is one of the factors leading to increase of conductivity.