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3 article(s) from Cirtoaje, Cristina

Dynamic behavior of nematic liquid crystal mixtures with quantum dots in electric fields

Emil Petrescu,
Cristina Cirtoaje and
Octavian Danila

Beilstein J. Nanotechnol. 2018, 9, 399–406, doi:10.3762/bjnano.9.39

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Figure 1: Molecular director orientation of a liquid crystal with a positive anisotropy in a planar cell expo...

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Figure 2: Molecular director and quantum dot orientation in a planar LC cell subjected to electric field.

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Figure 3: Nematic molecular orientation around an ellipsoidal QD.

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Figure 4: Experimental setup for the dynamic study of the LC + QDs mixture.

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Figure 5: Fréedericksz transition for 5CB and 5CB + QD. Lines are guide to the eyes.

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Figure 6: Dynamic measurement of emergent light intensity: a) for LC sample when the field is on; b)for LC sa...

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Figure 7: Schematic representation of the molecular orientation around a QD a) when the field is switched on ...

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Full Research Paper

Published 01 Feb 2018

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Dynamic behavior of a nematic liquid crystal with added carbon nanotubes in an electric field

Emil Petrescu and
Cristina Cirtoaje

Beilstein J. Nanotechnol. 2018, 9, 233–241, doi:10.3762/bjnano.9.25

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Figure 1: Liquid crystal molecular orientation inside a LC cell exposed to an electric field. [Graphic 1] is the undistu...

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Figure 2: Carbon nanotubes in a liquid crystal cell exposed to an electric field.

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Figure 3: Orientation of a liquid crystal molecule on a CNT surface.

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Figure 4: Relative orientation of a liquid crystal molecule on a carbon nanotube surface. a) The electric fie...

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Figure 5: Experimental setup for the dynamic study of LC + SWCNTs in an electric field.

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Figure 6: Fréedericksz transitions for 5CB and 5CB + SWNCTs.

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Figure 7: Variation of the intensity of a light beam traversing a cell containing pure 5CB. a) The field is s...

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Figure 8: Variation of the intensity of a light beam traversing a cell containing LC + SWCNTs. a) The field i...

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Full Research Paper

Published 22 Jan 2018

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Dynamic behavior of a nematic liquid crystal mixed with CoFe₂O₄ ferromagnetic nanoparticles in a magnetic field

Emil Petrescu,
Cristina Cirtoaje and
Cristina Stan

Beilstein J. Nanotechnol. 2017, 8, 2467–2473, doi:10.3762/bjnano.8.246

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Figure 1: Schematic representation of a laser beam (λ = 632.8 nm) passing through a planar nematic cell place...

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Figure 2: The deviation angle of molecular director inside a planar cell.

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Figure 3: Experimental setup for the study of the internal organization of the mixture of 5CB with CoFe₂O₄.

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Figure 4: Magnetic Fréedericksz threshold for a) pure 5CB liquid crystals and b) the mixture of 5CB and CoFe₂O...

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Figure 5: Experimental results plots for 0.1050 T magnetic field applied to the 5CB cell a) the field was app...

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Figure 6: Experimental results and theoretical curves for a magnetic field of 0.1050 T applied to the mixture...

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Figure 7: Fir branch-like structure in the cell with the mixture of 5CB with CoFe₂O₄.

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Full Research Paper

Published 22 Nov 2017

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Dynamic behavior of nematic liquid crystal mixtures with quantum dots in electric fields

Dynamic behavior of a nematic liquid crystal with added carbon nanotubes in an electric field

Dynamic behavior of a nematic liquid crystal mixed with CoFe2O4 ferromagnetic nanoparticles in a magnetic field

Dynamic behavior of a nematic liquid crystal mixed with CoFe₂O₄ ferromagnetic nanoparticles in a magnetic field