研究目的
Investigating the impact of carbon nanotube dispersions in liquid crystals on their dynamic properties under a magnetic field.
研究成果
The insertion of single-walled carbon nanotubes into liquid crystal cells increases the Freedericksz transition threshold and the relaxation times. This could be a disadvantage for display devices due to higher power consumption and longer response times, but may be advantageous for phase modulation systems where slow variation of the molecular deviation angle is desired.
研究不足
The study is limited to the effects of single-walled carbon nanotubes on nematic liquid crystals under a magnetic field. The concentration of nanotubes was limited to 0.5% volumetric fraction due to agglomeration at higher concentrations.
1：Experimental Design and Method Selection:
The study used a theoretical model based on the elastic continuum theory and a planar alignment of liquid crystal molecules on the nanotube’s surface.
2：Sample Selection and Data Sources:
The study involved two samples: one standard sample filled with Merck MLC 6602 liquid crystal, and another filled with a mixture of the same crystal and
3：5% (volumetric fraction) of single-walled carbon nanotubes (SWCNTs) from Aldrich. List of Experimental Equipment and Materials:
A Weiss electromagnet, a
4：8 nm He-Ne laser, two crossed polarizers, a Thor Labs PDA 36A photovoltaic cell, and LC-cell glass plates prepared for homogeneous alignment using Polyvinyl alcohol (PVA) solution. Experimental Procedures and Operational Workflow:
6 The emergent beam intensity was recorded every
5：2 ms, and the intensity versus time plot was printed. The relaxation times were calculated by fitting the minimum number versus the time plot. Data Analysis Methods:
The relaxation times were calculated by fitting the experimental data with theoretical models.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
