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Polimer ile Kararlı Hale Gelen Mavi Faz Sıvı Kristallerine Polimer Yapıların Etkisi

Year 2017, , 26 - 38, 08.12.2017

Nejmettin Avcı

https://doi.org/10.17776/csj.349323

Abstract

Bu çalışmada polimer yapıların mavi sıvı
kristaller üzerindeki etkileri incelenmiştir. Polimer ağ oluşumları sayesinde
oda sıcaklığının da dâhil olduğu geniş bir sıcaklık aralığında mavi faz sıvı
kristal örnekleri elde edilmiştir. Polimer ile kararlı hale getirilmiş her bir
mavi faz sıvı kristal örneğin sözü edilen faz aralığı en az C’dir. Deneysel sonuçlar göstermektedir ki; sıvı
kristal moleküller ile polimer ağ oluşum arasındaki etkileşim enerjisi, mavi
faz sıvı kristallerin elektro-optik performanslarını etkilemektedir. Polimer
ağın demirleme enerjisi arttıkça çalışma voltajı artmaktadır. Demirleme
enerjisi yüksek olan örneklerin cevaplama süreleri hızlı, Kerr sabitleri ve
histeresizi düşüktür. Ayrıca bütün örneklerin Kerr sabiti değerleri nitzobenzenin
Kerr sabiti değerinden en az iki mertebe yüksektir. 

Keywords

Polimer mavi faz sıvı kristal tepki süresi Kerr sabiti

References

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  • [2]. Castles, F., Morris, S. M., Terentjev, E. M., Coles, H. J. 2010. Thermodynamically stable blue phases. Physical review letters, 104(15), 157801.
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  • [9]. Yoshizawa, A., Kogawa, Y., Kobayashi, K., Takanishi, Y., Yamamoto, J. 2009. A binaphthyl derivative with a wide temperature range of a blue phase. Journal of Materials Chemistry, 19(32), 5759-5764. [10]. Taushanoff, S., Van Le, K., Williams, J., Twieg, R. J., Sadashiva, B. K., Takezoe, H., Jákli, A. 2010. Stable amorphous blue phase of bent-core nematic liquid crystals doped with a chiral material. Journal of Materials Chemistry, 20(28), 5893-5898.
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  • [12]. Wang, H., Zheng, Z., Shen, D. 2012. Blue phase liquid crystals induced by bent-shaped molecules based on 1, 3, 4-oxadiazole derivatives. Liquid Crystals, 39(1), 99-103.
  • [13]. Yoshizawa, A., Sato, M., Rokunohe, J. 2005. A blue phase observed for a novel chiral compound possessing molecular biaxiality. Journal of Materials Chemistry, 15(32), 3285-3290.
  • [14]. Kikuchi, H., Yokota, M., Hisakado, Y., Yang, H., and Kajiyama, T. 2002. Polymer-stabilized liquid crystal blue phases. Nature materials, 1(1), 64-68.
  • [15]. Hisakado, Y., Kikuchi, H., Nagamura, T., Kajiyama, T. 2005. Large electro‐optic Kerr effect in polymer‐stabilized liquid‐crystalline blue phases. Advanced Materials, 17(1), 96-98.
  • [16]. Dierking, I., Blenkhorn, W., Credland, E., Drake, W., Kociuruba, R., Kayser, B., Michael, T. 2012. Stabilising liquid crystalline blue phases. Soft Matter, 8(16), 4355-4362.
  • [17]. Karatairi, E., Rožič, B., Kutnjak, Z., Tzitzios, V., Nounesis, G., Cordoyiannis, G., Thoen, J., Glorieux, C. Kralj, S. 2010. Nanoparticle-induced widening of the temperature range of liquid-crystalline blue phases. Physical Review E, 81(4), 041703.
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  • [19]. Wang, L., He, W., Xiao, X., Meng, F., Zhang, Y., Yang, P., Wang, L., Xiao, J., Yang, H. Lu, Y. 2012. Hysteresis‐Free Blue Phase Liquid‐Crystal‐Stabilized by ZnS Nanoparticles. small, 8(14), 2189-2193.
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  • [23]. Yan, J., Cheng, H. C., Gauza, S., Li, Y., Jiao, M., Rao, L., Wu, S. T. 2010. Extended Kerr effect of polymer-stabilized blue-phase liquid crystals. Applied Physics Letters, 96(7), 071105.
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  • [26]. Rao, L., Yan, J., Wu, S. T., Yamamoto, S. I., Haseba, Y. 2011. A large Kerr constant polymer-stabilized blue phase liquid crystal. Applied Physics Letters, 98(8), 081109.
  • [27]. Chen, K. M., Gauza, S., Xianyu, H., Wu, S. T. 2010. Hysteresis effects in blue-phase liquid crystals. Journal of Display Technology, 6(8), 318-322.
  • [28]. Chen, Y., Xu, D., Wu, S. T., Yamamoto, S. I., and Haseba, Y. 2013. A low voltage and submillisecond-response polymer-stabilized blue phase liquid crystal. Applied Physics Letters, 102(14), 141116.
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  • [30]. Choi, H., Higuchi, H., Kikuchi, H. 2011. Electrooptic response of liquid crystalline blue phases with different chiral pitches. Soft Matter, 7(9), 4252-4256.
  • [31]. Zhu, J. L., Ni, S. B., Chen, C. P., Song, X. L., Chen, C. Y., Lu, J. G., Su, Y. 2014. The influence of polymer system on polymer-stabilised blue phase liquid crystals. Liquid Crystals, 41(6), 891-896.
  • [32]. Xu, D., Yan, J., Yuan, J., Peng, F., Chen, Y., Wu, S. T. 2014. Electro-optic response of polymer-stabilized blue phase liquid crystals. Applied Physics Letters, 105(1), 011119.
  • [33]. Yan, J., Wu, S. T. 2011. Effect of polymer concentration and composition on blue phase liquid crystals. Journal of Display Technology, 7(9), 490-493.
  • [34]. Hsieh, P. J., Chen, H. M. P. 2015. Hysteresis-free polymer-stabilised blue phase liquid crystals comprising low surface tension monomers. Liquid Crystals, 42(2), 216-221.

The Effect of Polymer Structures on Polymer Stabilized Blue Phase Liquid Crystals

Year 2017, , 26 - 38, 08.12.2017

Nejmettin Avcı

https://doi.org/10.17776/csj.349323

Abstract

In the present work, the effects of polymer
structures on blue phase liquid crystals were carried out. Blue-phase liquid
crystal samples with wide temperature range including room temperature were
obtained by means of the polymer network formation. The temperature range of
each sample with polymer-stabilized blue phase liquid crystal is at least C. The experimental results show that the
electro-optical performances of blue phase are influenced by the interaction
energy between the liquid crystal molecules and polymer network structure. As
the anchoring energy of polymer network increases, the operating voltage
increases. The response time of samples with high anchoring energy is faster
and the kerr constant and hysteresis of those are smaller. In addition, the
Kerr values of all samples are at least two orders of magnitude larger than
that of nitrobenzene.

Keywords

Polymer blue phase liquid crystal response time Kerr constant

References

  • [1]. Kikuchi, H. 2007. Liquid crystalline blue phases. In Liquid crystalline functional assemblies and their supramolecular structures: 99-117. Springer Berlin Heidelberg.
  • [2]. Castles, F., Morris, S. M., Terentjev, E. M., Coles, H. J. 2010. Thermodynamically stable blue phases. Physical review letters, 104(15), 157801.
  • [3]. Yan, J., Wu, S. T. 2011. Polymer-stabilized blue phase liquid crystals: a tutorial [Invited]. Optical Materials Express, 1(8), 1527-1535.
  • [4]. Li, Y., Huang, S., Zhou, P., Liu, S., Lu, J., Li, X., Su, Y. 2016. Polymer‐Stabilized Blue Phase Liquid Crystals for Photonic Applications. Advanced Materials Technologies, 1600102, 1-28.
  • [5]. Chen, Y., Wu, S. T. 2014. Recent advances on polymer‐stabilized blue phase liquid crystal materials and devices. Journal of Applied Polymer Science, 40556,1-10.
  • [6]. Rao, L., Wu, S. T. 2015. Low-voltage blue phase liquid crystal displays. Liquid Crystals Today, 24(1), 3-12.
  • [7]. Yan, J., Rao, L., Jiao, M., Li, Y., Cheng, H. C., Wu, S. T. 2011. Polymer-stabilized optically isotropic liquid crystals for next-generation display and photonics applications. Journal of Materials Chemistry, 21(22), 7870-7877.
  • [8]. Coles, H. J., Pivnenko, M. N. 2005. Liquid crystal ‘blue phases’ with a wide temperature range. Nature, 436(7053), 997-1000.
  • [9]. Yoshizawa, A., Kogawa, Y., Kobayashi, K., Takanishi, Y., Yamamoto, J. 2009. A binaphthyl derivative with a wide temperature range of a blue phase. Journal of Materials Chemistry, 19(32), 5759-5764. [10]. Taushanoff, S., Van Le, K., Williams, J., Twieg, R. J., Sadashiva, B. K., Takezoe, H., Jákli, A. 2010. Stable amorphous blue phase of bent-core nematic liquid crystals doped with a chiral material. Journal of Materials Chemistry, 20(28), 5893-5898.
  • [11]. Lee, M., Hur, S. T., Higuchi, H., Song, K., Choi, S. W., Kikuchi, H. 2010. Liquid crystalline blue phase I observed for a bent-core molecule and its electro-optical performance. Journal of Materials Chemistry, 20(28), 5813-5816.
  • [12]. Wang, H., Zheng, Z., Shen, D. 2012. Blue phase liquid crystals induced by bent-shaped molecules based on 1, 3, 4-oxadiazole derivatives. Liquid Crystals, 39(1), 99-103.
  • [13]. Yoshizawa, A., Sato, M., Rokunohe, J. 2005. A blue phase observed for a novel chiral compound possessing molecular biaxiality. Journal of Materials Chemistry, 15(32), 3285-3290.
  • [14]. Kikuchi, H., Yokota, M., Hisakado, Y., Yang, H., and Kajiyama, T. 2002. Polymer-stabilized liquid crystal blue phases. Nature materials, 1(1), 64-68.
  • [15]. Hisakado, Y., Kikuchi, H., Nagamura, T., Kajiyama, T. 2005. Large electro‐optic Kerr effect in polymer‐stabilized liquid‐crystalline blue phases. Advanced Materials, 17(1), 96-98.
  • [16]. Dierking, I., Blenkhorn, W., Credland, E., Drake, W., Kociuruba, R., Kayser, B., Michael, T. 2012. Stabilising liquid crystalline blue phases. Soft Matter, 8(16), 4355-4362.
  • [17]. Karatairi, E., Rožič, B., Kutnjak, Z., Tzitzios, V., Nounesis, G., Cordoyiannis, G., Thoen, J., Glorieux, C. Kralj, S. 2010. Nanoparticle-induced widening of the temperature range of liquid-crystalline blue phases. Physical Review E, 81(4), 041703.
  • [18]. Yoshida, H., Tanaka, Y., Kawamoto, K., Kubo, H., Tsuda, T., Fujii, A., Kuwabata, S., Kikuchi, H. Ozaki, M. 2009. Nanoparticle-stabilized cholesteric blue phases. Applied physics express, 2(12), 121501.
  • [19]. Wang, L., He, W., Xiao, X., Meng, F., Zhang, Y., Yang, P., Wang, L., Xiao, J., Yang, H. Lu, Y. 2012. Hysteresis‐Free Blue Phase Liquid‐Crystal‐Stabilized by ZnS Nanoparticles. small, 8(14), 2189-2193.
  • [20]. Stamatoiu, O., Mirzaei, J., Feng, X., Hegmann, T. 2011. Nanoparticles in liquid crystals and liquid crystalline nanoparticles. In Liquid Crystals (pp. 331-393). Springer Berlin Heidelberg.
  • [21]. Rao, L., Ge, Z., Gauza, S., Chen, K. M., Wu, S. T. 2010. Emerging liquid crystal displays based on the Kerr effect. Molecular Crystals and Liquid Crystals, 527(1), 30-42.
  • [22]. Li, B. X., Borshch, V., Shiyanovskii, S. V., Liu, S. B., Lavrentovich, O. D. 2015. Kerr effect at high electric field in the isotropic phase of mesogenic materials. Physical Review E, 92(5), 050501.
  • [23]. Yan, J., Cheng, H. C., Gauza, S., Li, Y., Jiao, M., Rao, L., Wu, S. T. 2010. Extended Kerr effect of polymer-stabilized blue-phase liquid crystals. Applied Physics Letters, 96(7), 071105.
  • [24]. E. Hecht, Optics, 2nd ed., Addison-Wesley Publishing Company, Reading, MA (1987). 318-320.
  • [25]. Avci, N. 2017. The influence of diluter system on polymer-stabilised blue-phase liquid crystals. Liquid Crystals, 1-9.
  • [26]. Rao, L., Yan, J., Wu, S. T., Yamamoto, S. I., Haseba, Y. 2011. A large Kerr constant polymer-stabilized blue phase liquid crystal. Applied Physics Letters, 98(8), 081109.
  • [27]. Chen, K. M., Gauza, S., Xianyu, H., Wu, S. T. 2010. Hysteresis effects in blue-phase liquid crystals. Journal of Display Technology, 6(8), 318-322.
  • [28]. Chen, Y., Xu, D., Wu, S. T., Yamamoto, S. I., and Haseba, Y. 2013. A low voltage and submillisecond-response polymer-stabilized blue phase liquid crystal. Applied Physics Letters, 102(14), 141116.
  • [29]. Chen, K. M., Gauza, S., Xianyu, H., Wu, S. T. 2010. Submillisecond gray-level response time of a polymer-stabilized blue-phase liquid crystal. Journal of display technology, 6(2), 49-51.
  • [30]. Choi, H., Higuchi, H., Kikuchi, H. 2011. Electrooptic response of liquid crystalline blue phases with different chiral pitches. Soft Matter, 7(9), 4252-4256.
  • [31]. Zhu, J. L., Ni, S. B., Chen, C. P., Song, X. L., Chen, C. Y., Lu, J. G., Su, Y. 2014. The influence of polymer system on polymer-stabilised blue phase liquid crystals. Liquid Crystals, 41(6), 891-896.
  • [32]. Xu, D., Yan, J., Yuan, J., Peng, F., Chen, Y., Wu, S. T. 2014. Electro-optic response of polymer-stabilized blue phase liquid crystals. Applied Physics Letters, 105(1), 011119.
  • [33]. Yan, J., Wu, S. T. 2011. Effect of polymer concentration and composition on blue phase liquid crystals. Journal of Display Technology, 7(9), 490-493.
  • [34]. Hsieh, P. J., Chen, H. M. P. 2015. Hysteresis-free polymer-stabilised blue phase liquid crystals comprising low surface tension monomers. Liquid Crystals, 42(2), 216-221.
There are 33 citations in total.

Details

Journal Section Natural Sciences
Authors

Nejmettin Avcı

Publication Date December 8, 2017
Submission Date April 3, 2017
Acceptance Date August 16, 2017
Published in Issue Year 2017

Cite

APA Avcı, N. (2017). The Effect of Polymer Structures on Polymer Stabilized Blue Phase Liquid Crystals. Cumhuriyet Science Journal, 38(4), 26-38. https://doi.org/10.17776/csj.349323