Rudzki Arkadiusz, Evans Dean R, Cook Gary, Haase Wolfgang
Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Darmstadt, Germany.
Appl Opt. 2013 Aug 1;52(22):E6-14. doi: 10.1364/AO.52.0000E6.
The influence of the size of harvested barium titanate nanoparticles on the properties of ferroelectric liquid crystal (FLC) nanocolloids was investigated by electro-optical and dielectric methods. The spontaneous polarization and the switching time are decreased for the liquid crystalline nanocolloids compared to nondoped FLC mixtures of different dipole strengths; this dependence is stronger for small size particles (9 nm) and weaker for larger size particles (26 nm) by the same concentration in weight. The decrease of the Goldstone mode (GM) relaxation frequency and the decrease of the dielectric GM absorption strength of the nanocomposites compared to the nondoped FLC mixture go stepwise with the increase of the nanoparticles diameter. Results have been interpreted via strong interaction between the FLC dipoles and the dipoles of the highly polar barium titanate nanoparticles.
通过电光和介电方法研究了收获的钛酸钡纳米颗粒尺寸对铁电液晶（FLC）纳米胶体性能的影响。与不同偶极强度的未掺杂FLC混合物相比，液晶纳米胶体的自发极化和开关时间降低；在相同重量浓度下，对于小尺寸颗粒（9纳米）这种依赖性更强，而对于大尺寸颗粒（26纳米）则较弱。与未掺杂的FLC混合物相比，纳米复合材料的戈德斯通模（GM）弛豫频率降低以及介电GM吸收强度降低随着纳米颗粒直径的增加而逐步变化。结果通过FLC偶极与高极性钛酸钡纳米颗粒的偶极之间的强相互作用进行了解释。
