ABSTRACT

We are reporting on the interaction of zinc oxide (ZnO) nanoparticles (NPs) with the lyotropic phase comprises of Polyoxyethylene (20) sorbitan monolaurate and protic solvent ethylene glycol. The concentration of the NPs has been varying from 0.05 to 0.5 wt%. Multiwall lamellar and inverse phases have been observed at lower and higher concentration of ZnO NPs doping. Interestingly, the organization of ZnO NPs on the periphery and inside the periphery of ring-like structures has been observed at lower and higher concentration of the dopant, respectively. Such organization of the NPs can be explained considering interfacial interaction amid host and dopant and may also attribute to the adsorption mechanisms of surfactant. Effects of NPs doping on the dielectric dynamics has also been examined. About 32.6% decrease in the dielectric permittivity has been noticed at higher NPs doping. Such decrement in permittivity could be a result of the screening of the ZnO NPs dipole moment by the adsorption of surfactant molecules on their surface. Relaxation and optical parameters of the non-doped and doped mixtures have also been discussed.

摘要

我们正在报告的氧化锌（ZnO）纳米粒子（NPs）与溶致相的相互作用包括聚氧乙烯（20）脱水山梨醇单月桂酸酯和质子溶剂乙二醇。NP的浓度在0.05至0.5重量％之间变化。ZnO NPs掺杂浓度越来越低时，观察到多壁层状和反相。有趣的是，分别在较低和较高浓度的掺杂剂下观察到环状结构的外围和内部的ZnO NPs的组织。可以考虑在主体和掺杂剂之间的界面相互作用来解释NP的这种组织，并且还可以归因于表面活性剂的吸附机理。还研究了NP掺杂对介电动力学的影响。大约32 在较高的NP掺杂下，介电常数降低了6％。介电常数的这种降低可能是由于表面活性剂分子在其表面上的吸附而屏蔽了ZnO NPs偶极矩。还讨论了非掺杂和掺杂混合物的弛豫和光学参数。