Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (11): 1378-1383.DOI: 10.11944/j.issn.1000-0518.2018.11.170450

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Effect of Polyhedral Oligomeric Silsesquioxanes-modified Gold Nanoparticles on 4-n-Pentyl-4'-ctanobiphenyl Liquid Crystal Properties

MA Lia,XU Jingweib,YANG Chuanqic,LI Yunhuia,MA Yuqina*(),ZHAO Yongxiab*()   

  1. aSchool of Chemistry and Environmental Engineering,Changchun University of Science and Technology,Changchun 130000,China
    bState Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    cSchool of Business,Changchun Guanghua University,Changchun 133333,China
  • Received:2017-12-12 Accepted:2018-03-22 Published:2018-10-31 Online:2018-10-31
  • Contact: MA Yuqin,ZHAO Yongxia
  • Supported by:
    Supported by the Jilin Science and Technology Development Project(No. 20170204038GX)


In order to effectively reduce the turn-on voltage of the liquid crystal device and low power consumption characteristics. Gold nanoparticles with an average particle diameter of about 5 nm were prepared by using polyhedral oligomeric silsesquioxanes(POSS) as the modification ligand and NaBH4 as the reductant to reduce the chloroauric acid. Gold nanoparticles were doped into nematic liquid crystal 4-n-pentyl-4'-cyanobiphenyl(5CB) with different mass fractions to study its effect on the viscosity, the threshold voltage and the phase transition temperature. The results show that the viscosity and the threshold voltage of 5CB are decreased by doping with POSS modified gold nanoparticles. Moreover, the phase transition temperature range of 5CB is broadened by addition of the gold nanoparticles.

Key words: gold nanoparticles, phase transition temperature, threshold voltage, viscosity, liquid crystal