銀－聚苯乙烯殼核球於高分子分散液晶薄膜元件之應用

以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：39

、訪客IP：18.191.240.243

姓名

吳庭昀(Ting-Yun Wu) 查詢紙本館藏

畢業系所

光電科學與工程學系

論文名稱

銀－聚苯乙烯殼核球於高分子分散液晶薄膜元件之應用
(Application of Ag-PS Core Shell Microspheres Doped Polymer Dispersed Liquid Crystal Film)

相關論文

★ 氮化鎵微光學元件之研究	★ 二維雙輸入雙輸出光子晶體分光器
★ 矽光波導元件光耗損研究	★ 矽晶片波導元件研究
★ 砷化鎵光子晶體共振腔研究	★ 應用奈米小球製作之波導模態共振器
★ 光子晶體異常折射之能流研究	★ 氮化鎵光子晶體共振腔
★ 分析BATC大視野多色巡天計畫中正常星系的質光比	★ 新型中空多模干涉分光器
★ 表面電漿對於半導體發光元件光萃取效率的影響之探討	★ 半導體光子晶體雷射之研究
★ 新型中空光波導研製與應用	★ 動態波長分配技術在乙太被動光纖網路的應用
★ 禁止頻帶材料的光學與聲波特性研究	★ 漸變式光子晶體透鏡研究

檔案

[Endnote RIS 格式]

[Bibtex 格式]

[相關文章]

[文章引用]

[完整記錄]

[館藏目錄]

[檢視]

[下載]

本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

在本論文中，我們探討PMMA微米球及銀微米球摻雜在高分子分散液晶(Polymer Dispersed Liquid Crystal, 簡稱PDLC)中的光電特性，藉由操作電壓的調變可以控制此元件從散射態轉為穿透態。
本實驗分成三部分，實驗的第一部分我們利用不同的高分子材料，分析材料對於PDLC光電性質之影響，第二部分我們在PDLC元件中摻入直徑為3m之PMMA微米球，維持穿透態應有穿透率並降低操作電壓，第三部分的實驗，將直徑為3m之銀微米球摻入PDLC元件，大幅降低了元件從散射態至穿透態所需之操作電壓。
PDLC光電性質優化之結果，我們利用摻雜5 wt%、直徑為3微米之銀微米球摻入PDLC中，操作電壓為44伏特且穿透態維持高穿透率70%，有效的降低操作電壓，減少元件操作時能源的損耗。最後，我們利用此結果，進行大尺寸之PDLC元件製作，增加實際的應用性。

摘要(英)

In this study, we investigate the electro-optic properties of Polymer Dispersed Liquid Crystal (PDLC) doped with PMMA and Ag microspheres. It can be switched from light scattering to transparent states by modulating the applied AC voltage.
The study in this thesis is divided into three parts. In the first part, we discussed the influence of the weight ratio of LC and polymer on their electric-optic properties. In the second part of experiment, the required applied AC voltage to obtain transparent state can be reduced by doping PMMA microspheres whose diameter is about 3 um. In the third part of experiment, it is demonstrated that the applied AC voltage can be further reduced by doping with 3 m-diameter silver microspheres.
By doping with 5 wt% 3 m-diameter silver microspheres into PDLC cell, the electro-optic properties of PDLC can be optimized. The operating voltage to provide 70 % transmittance is reduced to 44 V, so that the energy consumption can be reduced significantly. Additionally, we have also successfully demonstrated such a PDLC device having large panel size.

關鍵字(中)

★ 高分子分散液晶薄膜
★ 液晶

關鍵字(英)

★ PDLC
★ LC

論文目次

摘要……………………………………………………………………...…I
Abstract………………………………………………………………….…II
致謝……………………………………………………………………….III
圖目錄…………………………………………………………………..VIII
表目錄…………………………………………………………….……..XII
第一章緒論 …………………………………………...…………..……..1
1.1 前言 ………………………………………………………….......1
1.2 液晶簡介 ………………………………………………………...3
1.2.1 液晶分類 ……………………………………………….....4
1.2.2 液晶的光電特性 …………………………………….....…5
1.3 增強材料之應用 ………………………………………….....…10
1.3.1 高分子分散液晶摻雜染料 …………………….….....….10
1.3.2 液晶填充奈米粒子 ………………………………..….....11
1.3.3 高分子分散液晶摻雜奈米粒子 …………………....…...12
1.4 本章結論與研究動機 …………………………………..……...14
第二章基本原理 ………………………………….…………….…...…16
2.1高分子分散液晶簡介與散射理論 …………………………......16
2.1.1 PDLC聚合型式及聚合物材料介紹 ….……………...….16
2.1.2 PDLC散光原理 ………………………………………….18
2.1.3 穿透率變化與對比度計算 ………………………….......21
2.1.4 反應時間計算 ……………………………………….......22
2.2 金屬球殼簡介 ……………………………………………...…..23
2.3 結論 ………………………………………………………...…..25
第三章實驗製程 …………………………………………………….....26
3.1 實驗材料 ……………………………………………………….26
3.2 製作流程 ……………………………………………………….28
3.3 量測儀器與架構 ……………………………………………….32
3.4 結論 …………………………………………………………….32
第四章實驗結果與討論 ……………………………………………….34
4.1 高分子膠對PDLC之影響 …………………………………….34
4.1.1 高分子膠摻雜濃度對PDLC之影響 …………………...35
4.1.2 交聯劑含量對PDLC光電性質影響 …………………...38
4.2 高分子分散液晶摻雜PMMA ……………………………...…..43
4.3 高分子分散液晶摻雜微米金屬球 …………………………….47
4.3.1 微米金屬球摻雜對PDLC光電性質之影響 …………...49
4.3.2 較大面積之金屬微米球摻入PDLC元件 …………...…61
4.4 結論 …………………………………………………………….63
第五章總結與未來工作 ……………………………………………….65
5.1 總結 …………………………………………………………….65
5.2 未來工作 ……………………………………………………….66
參考文獻 ……………………………………………………….………..68

參考文獻

[1] S. T. Wu and D. K. Yang, “Reflective Liquid Crystal Displays, ” John Wiley & Sons Inc, New York, 2001.
[2] C.T. Liu, “Revolution of the TFT LCD technology, ” J. Display Technol, Vol 3, pp. 342–350, 2007.
[3] C. H. An, J. Yang, Y. E. Lee, C. H. Kim, E. Nam, D. Jung, M. Ho. Cho, and H. Kim, “A Triple-Layered Microcavity Structure for Electrophoretic Image Display,” IEEE Trans. On Electron Device, Vol 58, pp. 1116-1120, 2011.
[4] D. W. Lee and J. W. Shiu, “Writable Cholesteric Liquid Crystal Display and the Algorithm Used to Detect Its Image,” Journal Of Display Technology, Vol 5, pp. 172-177, 2009.
[5] B. Y. Lee and J. H. Lee, “Printable flexible cholesteric capsule display with a fine resolution of RGB subpixels,” Current Applied Physics, Vol 11, pp. 1389-1393, 2011.
[6] B. Comiskey, J. D. Albert and H. Yoshizawa, “An electrophoreticink for-printed reflective electronic displays,” Nature, Vol 394, pp. 253-255, 1998.
[7] C. M. Lu and C. L. Wey, ” A Controller Design for Color Active-Matrix Displays Using Electrophoretic Inks and Color Filters,” Journal Of Display Technology, Vol 7, pp. 482-489, 2011.
[8] J. L. Fergason, “Encapsulated liquid crystal and method,” US Patent 4,435,047, 1984.
[9] http://www.polytron-global.com/about-polytron-glass/?lang=tw
[10] 松本正一、角田市良合著，液晶之基礎與應用，劉瑞祥譯，國立編譯館，台北市，民國八十五年。
[11] Peter J. Collings and Michael Hird 合著, Introduction to Liquid Crystal Chemistry and Physics, 楊怡寬，郭蘭生，鄭殷立合譯，民國90年。
[12] K. H. Kim, H. J. Jin, K. H. Park, J. H. Lee and T. H. Yoon, “Long-pitch cholesteric liquid crystal cell for switchable achromatic reflection,” Opt. Express, Vol 13, pp. 16745-16750, 2010.
[13] I. G. Chistyakov, ” Liquid Crystals,” Usp. Fiz. Nauk, Vol 89, pp. 563-602, 1966.
[14] G. Y. Chiu, ”Microsphere Doped Polymer Dispersed Liquid Crystal Films,” National Central University, Masters dissertation, 2013.
[15]http://promotion.ep.nctu.edu.tw/teaches/95/95nctu.pdf
[16] K. J. Yang and D. Y. Yoon, ”Electro-optical characteristics of dye-doped polymer dispersed liquid crystals,” Journal of Industrial and Engineering Chemistry, Vol 17, pp. 543–548, 2011.
[17] R. R. Deshmukh and M. K. Malik, ”Effect of dichroic dye on phase separation kinetics and electro-optical characteristics of polymer dispersed liquid crystals,” J. Phys. Chem. Solids, Vol 74, pp. 215-224, 2013.
[18] H. Y. Jung, H. J. Kim and Y. G. Kang, “Enhanced electro-optical properties of Y2O3nanoparticle-doped twisted nematic liquid crystal devices,” Liquid Crystals, Vol 39, pp. 789-793, 2012.
[19] W. K. Lee, S. J. Hwang and M. J. Cho, “CIS-Zns quantum dots for self-aligned liquid crystal molecules with superior ele-optic properties,” Nanoscale, Vol 5, pp. 193-199, 2012.
[20] Y. S. Ha, H. J. Kim, H. G. Park and D. S. Seo, “Enhancement of electro-optic properties in liquid crystal devices via titanium nanoparticle doping,” Opt. Express, Vol 20, pp. 6448-6455, 2012.
[21] S. C. Jeng, S. J. Hwang and C. Y. Yang, “Tunable pretilt angles based on nanoparticles-doped planar liquid-crystal cells,” Opt. Lett. Vol 34, pp. 455-457, 2009.
[22] K. K. Vardanyan, R. D. Walton and D. M. Bubb, “Liquid crystal composites with a high percentage of gold nanoparticles,” Liquid Crystals, Vol 38, pp. 1279-1287, 2011.
[23] K. K. Vardanyan, E. D. Palazzo and R. D. Walton, “Nematic nanocomposites with enhanced opticalbirefringence,” Liquid Crystals, Vol 38, pp. 709-715, 2011.
[24] D. Sikharulidze, “Naoparticles:Anapproach to controlling an electro-optical behavior of nematic liquid crystals,” Appl. Phys. Lett. Vol 86, 033507, 2005.
[25] C. E. Leeand and S. C. Jeng, “Bistal liquid crystal devices with nanoparticle-coated polyimide alignment films,” Opt. Lett. Vol 38, pp. 1013-1015, 2013.
[26] O. V. Yaroshchuk and L. O. Dolgov, “Electro-optics and structure of polymer dispersed liquid crystals doped with nanoparticles of inorganic materials,” Opt. Mater. Vol 29, pp. 1097-1102, 2007.

[27] B. G. Wu, J. L. West and J. W. Doane, ”Angular discrimination of light transmission through polymer-dispersed liquid-crystal films,” J.Appl. Phys. Vol 62, 1987.
[28] A. Hinojosa and S. C. Sharma, “Effects of gold nanoparticles on electro-optical properties of a polymer-dispersed liquid crystal,” Appl. Phys. Lett. Vol 97, 081114, 2010.
[29] D. S. Lee, Y. H. Ko, I. H. Shen and C. Y. Chao, ”Effect of light source, ambient illumination, character size and interline spacing on visual performance and visual fatigue with electronic paper displays,” Displays, Vol 32, pp. 1-7, 2011.
[30] S. S. Parab, M. K. Malik and R. R. Deshmukh, ” Dielectric relaxation and electro-optical switching behavior of nematic liquid crystal dispersed in poly(methyl methacrylate),” J. Non-Cryst. Solids, Vol 358, pp. 2713–2722, 2012.
[31] Y. K. Fung, D. K. Yang, S. Ying. L. C. Chien, S. Zumer and J. W. Doane, ”Polymer networks formed in liquid crystals,” Liq. Cryst. Vol 19, pp. 797–801, 1995.
[32] M. Mucha, ”Polymer as an important component of blends and composites with liquid crystals,” Prog. Polym. Sci. Vol 28, pp. 837–873, 2003.
[33] S. Zumer and J. W. Doane, ”Light scattering from a small nematic droplet”, Phy. Rev. A. Vol 49, pp. 3373–3386, 1986.
[34] J. W. Caruthers,” On Rayleigh and Mie scattering”, ASA. Vol 14, 070001, 2013.
[35] T. T. Zhang, M. Kashima, M. Z. Zhang, F. Liu, P. Song, X. T. Zhao, C. H. Zhang, H. Cao and H. Yang, ” Effects of the functionality of epoxy monomer on the electro-optical properties of thermally-cured polymer dispersed liquid crystal films,” RSC Advances, Vol 2, pp. 2144-2148, 2012.
[36] F. Ahmad, M. Jamil, Y. J. Jeon, L. J. Woo, J. E. Jung, G. H. Lee and J. Park, ”Comparative Study on the Electro optical Properties of Polymer-Dispersed Liquid Crystal Films with Different Mixtures of Monomers and Liquid Crystals,” J. Appl. Vol 121, pp. 1424-1430, 2011.
[37] M. K. Malik, P. G. Bhatia and R. R. Deshmukh, ” Effect of nematic liquid crystals on optical properties of solvent induced phase separated PDLC composite films,” Indian Journal of Science and Technology, Vol 5, pp. 3440-3452, 2012.

[38] E. Scherschener, E. A. Dalchiele, E. M. Frins, C. D. Perciante, and J. A. Ferrari, ” Contrast enhancement in double-layered dye-doped polymer-dispersed liquid-crystal cells,” J. Appl. Vol 102, 014502, 2007.
[39] C. Amra, “From light scattering to the microstructure of thin-film multilayers,” Appl. Opt. Vol 32, pp 5481-5491, 1993.
[40] T. F. Zhu, B. H. Tan, X. F. Pan and W. D. Tao, “Electro-optical characteristic of Frequency Modulation in nano Ag doped PDLC,” SOPO, pp. 1-4, Shanghai, China, 2009.
[41] F. Frederix, J. M. Friedt, K. H. Choi, W. Laureyn, A. Campitelli, D. Mondelaers, F. Maes and G. Borghs, ” Biosensing Based on Light Absorption of Nanoscale Gold and Silver Particles,” Anal. Chem. Vol 75, pp. 6894-6900, 2003.
[42] J. H. Lee, J. J. Lee, Y. J. Lim, S. Kundu and S. W. Kang, ” Enhanced contrast ratio and viewing angle of polymer-stabilized liquid crystal via refractive index matching between liquid crystal and polymer network,” Opt. Express. Vol 21, pp. 26914-26920, 2013.
[43] S. W. Myoung, E. H. Kim and Y. G. Jung, ” Electro optical properties and microstructure of polymer-dispersed liquid crystal doped with various reinforcing materials,” Thin Solid Films, Vol 519, pp. 1558-1562, 2010.
[44] J. Klostermana, L. V. Natarajan, V. P. Tondiglia, R. L. Sutherland, T. J. White, C. A. Guymon and T. J. Bunning, “The influence of surfactant in reflective HPDLC gratings,” Polymer, Vol 45, pp. 7213–7218, 2004.

指導教授

陳啟昌、詹佳樺(Chii-Chang Chen Chia-Hua Chan)

審核日期

2015-7-16

推文