Morphology and dielectric properties of polymer dispersed liquid crystal with magnetic nanoparticles
Morphology and dielectric properties of polymer dispersed liquid crystal with magnetic nanoparticles
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发表时间：
2010
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通讯作者：
M. Timko;Z. Mitrova;V. Závisová;V. Lashkaryov
中科院分区：
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作者：
M. Timko;Z. Mitrova;V. Závisová;V. Lashkaryov
研究表明，在聚合物分散液晶(PDLC)中引入不同形状的磁性纳米粒子(MN)，可以产生两种效应：一是液滴尺寸减小，二是带有通孔的液滴数量增加。在频率范围内，Mn使介电常数的有效值增加了一个数量级以上，同时也增加了电导率的电子和离子分量。Mn降低了电子组分电导率随频率变化的指数。纳米粒子的存在引起的变化在数量上取决于它们的形状。1 10−
It has been shown that introduction of magnetic nanoparticles (MN) of various shapes with the concentration wt.% into polymer dispersed liquid crystal (PDLC) causes two effects: the size of liquid crystal droplets decreases, and the amount of the latter with through holes increases. MN increase the effective value of permittivity by more than one order within the frequency range , as well as the electron and ion components of conductivity. MN reduce the exponent in the frequency dependence of the electron component of conductivity. The changes caused by the presence of the nanoparticles quantitatively depend on their shape. 1 10 −