Comparison of Guest–Host Liquid Crystal Systems Doped with Azo or Anthraquinone Dyes

Gürlük, Meryem; Abdulkadir, Hilal Altindiş; Akkuş, Meryem Sena; Akkurt, Fatih; Alicilar, Ahmet

doi:10.1007/s40995-017-0186-0

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…The average temperature of nematic-isotropic transition of doped sample is calculated by using equation T NI = 0.5(T N +T I ) [63], and found 58.85 C. The phase transition difference of pure E7 and NP-doped E7 is found as ΔT NI = 0.2 C. Figure 9b and c shows the optical picture of E7 LC without and with cross polarizers, respectively. The texture of pure and doped LC under 1 V applied voltage is given in Figure 9d and e.…”

Section: Cobaltmentioning

confidence: 98%

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Eskalen¹,

Kerli²,

Özğan³

2017

Cobalt

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In this study, cobalt oxide Co 3 O 4 nanostructured material is synthesized by hydrothermal method by using different concentration of cobalt acetate salt at unique hydrothermal reaction time for five different hydrothermal reaction temperatures 105, 120, 140, 160, and 180 C. The obtained nanoparticles are annealed at 300 C for 5 h. Co 3 O 4 nanostructures are determined by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-vis spectroscopy. The hydrothermally produced samples were reannealed at 550 C, and morphological and structural properties were investigated deeply again. The effect of annealing temperature on morphologies and crystalline structure of cobalt oxide nanoparticle (NP) was also investigated. Nanopyramids and nanorods are two main morphologically obtained structures from the hydrothermal experiment. Nematic liquid crystal mixture E7 is doped with Co 3 O 4 nanorod. Phase transition and threshold voltage of pure and Co 3 O 4 NP-doped E7 LC are examined successfully. It reveals that for Co 3 O 4 NP-doped E7 phase transition temperature and threshold voltage increased very slightly.

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Section: Cobaltmentioning

confidence: 98%

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Eskalen¹,

Kerli²,

Özğan³

2017

Cobalt

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“…Different properties LCs' are needed for diverse applications areas. For these reasons, the required enhanced properties of liquid crystals are obtained by synthesizing a new liquid crystals [8,9] and/or a mixture of two or more different liquid crystals [10][11][12] and/or using polymer [13][14][15], nanoparticles [16][17][18][19] and dyes [20,21] and/or using at least two of them to reveal their LC behavior [22][23][24]. Among all of them, NPs are very important to obtain liquid crystals having different physical properties.…”

Section: Introductionmentioning

confidence: 99%

Thermal and electro-optic properties of graphene oxide-doped hexylcyanobiphenyl liquid crystal

2018

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Hexylcyanobiphenyl liquid crystal was doped with graphene oxide at ratios %0.25GO, %0.5GO, %1GO and %2GO, and the change in physical properties of pristine and the doped liquid crystals has been investigated. The phase transitions of prepared samples were studied by differential scanning calorimeter and polarized optical microscopy. The differential scanning calorimeter and polarized optical microscopy results are in good agreement when examining the nematic-isotropic liquid phase transition temperatures of the hexylcyanobiphenyl. The liquid crystal texture images obtained with polarized optical microscopy reveals that thermal stability of sample changed with graphene oxide concentration, i.e., increased with graphene oxide concentration. Impedance, capacitance, conductivity and real and imaginary dielectric constants of the pure and doped liquid crystals were obtained depending on frequency and voltage at the room temperature by using impedance analyzer. These electrical properties of the pure and the graphene oxide-doped samples showed an increase with increasing the graphene oxide ratio. The voltage-dependent light transmittance experiment revealed that threshold voltage of LC cells decreased for %0.25GO-and % 1GO-dispersed samples, but it was increased at %0.5GO-and %2GO-dispersed samples.

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Synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in the presence of Fe₃O₄@nano‐cellulose–OPO₃H as a bio‐based magnetic nanocatalyst

Mirjalili

Zaghaghi

Monfared

2019

J Chinese Chemical Soc

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Comparison of Guest–Host Liquid Crystal Systems Doped with Azo or Anthraquinone Dyes

Cited by 6 publications

References 26 publications

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Thermal and electro-optic properties of graphene oxide-doped hexylcyanobiphenyl liquid crystal

Synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in the presence of Fe₃O₄@nano‐cellulose–OPO₃H as a bio‐based magnetic nanocatalyst

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Comparison of Guest–Host Liquid Crystal Systems Doped with Azo or Anthraquinone Dyes

Cited by 6 publications

References 26 publications

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Thermal and electro-optic properties of graphene oxide-doped hexylcyanobiphenyl liquid crystal

Synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in the presence of Fe3O4@nano‐cellulose–OPO3H as a bio‐based magnetic nanocatalyst

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Synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones in the presence of Fe₃O₄@nano‐cellulose–OPO₃H as a bio‐based magnetic nanocatalyst