Morphological, dielectric, electro-optic and photoluminescence properties of titanium oxide nanoparticles enriched polymer stabilized cholesteric liquid crystal composites

被引:12
作者
Chauhan, Garima [1 ]
Malik, Praveen [1 ]
Deep, Akash [2 ]
机构
[1] Dr B R Ambedkar Natl Inst Technol, Dept Phys, Liquid Crystal Lab, Jalandhar, India
[2] Cent Sci Instruments Org, Mat Sci & Sensor Applicat, Chandigarh, India
关键词
Cholesteric liquid crystal; Polymer; TiO2; nanoparticles; Threshold voltage and saturation voltage; TIO2; NANOPARTICLES; CARBON NANOTUBES; BEHAVIOR; PARAMETERS; PARTICLES; NETWORKS; DISPLAY; SYSTEM;
D O I
10.1016/j.molliq.2023.121406
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Herein, TiO2 nanoparticles (NPs) dispersed polymer stabilized cholesteric liquid crystal (PSCLC) compos-ites are prepared and studied. Effect of TiO2 NPs doping in varying concentration into PSCLC, on the phases, molecular states, dielectric, electro-optic and photoluminescence properties are investigated in studied samples. The morphological studies reveal that the TiO2 NPs are responsible to switch the orien-tation of liquid crystal molecules into homeotropic state at a lower voltage. The permittivity reduced from 9.62 to 7.75 at an optimum doping amount (0.5 wt%) of TiO2 NPs. At this concentration, an improve-ment in dielectric anisotropy was found. A decrease in threshold voltage from 3.2 V to 1.4 V was observed. Further, the saturation voltage also decreases from 10.5 V to 7.5 V at 0.5 wt% doped TiO2 NPs. The photoluminescence intensity increase with TiO2 NPs concentration however emission wave-length does not change. This work may provide a facile approach to fabricate the low energy consumption based electro-optical devices with the affordable and eco-friendly nature of TiO2 NPs. (c) 2023 Elsevier B.V. All rights reserved.
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页数:9
相关论文
共 58 条
  • [11] Effect of Doped Insulating Nanoparticles on the Electro-Optical Characteristics of Nematic Liquid Crystals
    Chen, Wei-Ting
    Chen, Pei-Shiang
    Chao, Chih-Yu
    [J]. JAPANESE JOURNAL OF APPLIED PHYSICS, 2009, 48 (01)
  • [12] Electro-optical characteristics of polymer-dispersed liquid crystal containing copper (II) phthalocyanine as a function of UV irradiation time
    Choi, Se-Hoon
    Kim, Jin-Ah
    Heo, Gi Seok
    Park, Hong-Gyu
    [J]. JOURNAL OF MOLECULAR LIQUIDS, 2022, 363
  • [13] de Gennes P.-G., 1993, PHYS LIQUID CRYSTALS
  • [14] Fan J., 2015, Angew. Chem, V127, P2188
  • [15] TiO2 photocatalysis and related surface phenomena
    Fujishima, Akira
    Zhang, Xintong
    Tryk, Donald A.
    [J]. SURFACE SCIENCE REPORTS, 2008, 63 (12) : 515 - 582
  • [16] POLYMER NETWORKS FORMED IN LIQUID-CRYSTALS
    FUNG, YK
    YANG, DK
    YING, S
    CHIEN, LC
    ZUMER, S
    DOANE, JW
    [J]. LIQUID CRYSTALS, 1995, 19 (06) : 797 - 801
  • [17] Broadband reflection in polymer-stabilized cholesteric liquid crystal film with zinc oxide nanoparticles film thermal diffusion method
    Gan, Ping
    Zhang, Xuetao
    Zhao, Limin
    Shi, Weiting
    Cao, Hui
    Wang, Huihui
    Yang, Zhou
    Wang, Dong
    He, Wanli
    [J]. LIQUID CRYSTALS, 2021, 48 (14) : 1959 - 1968
  • [18] Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena
    Garbovskiy, Yuriy
    Glushchenko, Iryna
    [J]. CRYSTALS, 2015, 5 (04): : 501 - 533
  • [19] Enhancement of electro-optic properties in liquid crystal devices via titanium nanoparticle doping
    Ha, Yong-Seok
    Kim, Hyung-Jun
    Park, Hong-Gyu
    Seo, Dae-Shik
    [J]. OPTICS EXPRESS, 2012, 20 (06): : 6448 - 6455
  • [20] Haller I., 1975, Progress in Solid State Chemistry, V10, P103, DOI 10.1016/0079-6786(75)90008-4