摻雜碳奈米管之垂直排列與水平排列液晶盒的動態電光響應研究

Dynamic Electro-optical Responses of Homeotropic and Homogenous Liquid Crystal Cells Doped with Carbon Nanotubes

李豪哲(Hou-Che Li)

指導教授 ： 徐芝珊

中原大學/理學院/應用物理研究所/碩士(2009年)

https://doi.org/10.6840/cycu200900678

摘要

本論文研究摻雜碳奈米管的垂直排列型液晶盒和水平排列型液晶盒中，碳奈米管濃度影響其光學反躍之振幅的關係。藉由量測瞬間穿透光強度的變化，以瞭解碳奈米管對液晶盒動態之影響。在摻雜碳奈米管之垂直排列型液晶樣品中，光學反躍振幅較純液晶樣品減少，並且隨著碳奈米管的濃度增加，光學反躍振幅明顯減少；在摻雜碳奈米管之水平排列型液晶樣品中，其光學反躍振幅不隨著碳奈米管濃度增加而有所改變。 由模擬軟體DIMOS 2.0分析垂直排列液晶盒的動態行為並與實驗結果做比較，我們提出碳奈米管的存在可能會破壞了液晶的連續體，由動態模擬結果可將解釋添加不同濃度碳奈米管的光學反躍現象。

關鍵字

液晶 ； 碳奈米管 ； 迴流效應

並列摘要

We study the influence of carbon nanotube (CNT) on the backflow effect in the vertical-aligned (VA) and homogeneous cells. By measuring the transient optical transmission, the dynamic behaviors of CNT–doped LC cells are recorded. Experimental results show that doping with a small quantity of CNTs can suppress the backflow effect in the VA mode. The amplitudes of the optical bounces become smaller when we increase the concentration of CNTs. However, in the homogeneous cells, the optical bounce would not be changed in spite of the concentration of CNTs
We used DIMOS 2.0 to analyze the dynamic behavior of the homeotropic LC cell. We believe that the existence of CNTs destroys the continuity of LC. The dynamic transmittance in the simulation is similar to the optical bounce in the CNT-doped VA LC cells.

並列關鍵字

liquid crystal ； carbon nanotubes ； backflow effects

參考文獻

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