Present studies investigate the effect of gamma irradiation in the dielectric and electro-optical properties of a nematic liquid crystal (NLC) 4 cyano-4′-pentylbiphenyl (also referred to as 5CB) at the room temperature using the dielectric spectroscopy and the polarizing optical microscopic techniques. The value of dielectric permittivity (ε′) of 5CB modulates with the cumulative doses of gamma irradiation because of the generation of free radicals and ions. It has also been observed that the relaxation frequencies of 5CB are found to shift towards the higher frequency side with the increase in the effective dose of the gamma rays. Further, non-volatile memory of short duration is found to be induced in 5CB upon the gamma irradiation which is absent in the pristine 5CB. These results will pave the way to fabricate various memory devices based upon NLCs with the desired dielectric and electro-optical parameters by tuning the dose of gamma irradiations.

目前的研究使用介电谱和偏振光学技术研究了室温下伽马辐射对向列液晶（NLC）4氰基-4'-戊基联苯（也称为5CB）的介电和电光性质的影响微观技术。由于自由基和离子的产生，5CB的介电常数（ε'）值随伽马射线辐照的累积剂量而变化。还已经观察到，随着γ射线有效剂量的增加，发现5CB的弛豫频率向较高频率侧偏移。此外，发现在原始的5CB中不存在的γ辐射下，在5CB中诱导了短时间的非易失性存储。