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2 article(s) from Danila, Octavian

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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Electrical properties of a liquid crystal dispersed in an electrospun cellulose acetate network

Doina Manaila Maximean,
Octavian Danila,
Pedro L. Almeida and
Constantin Paul Ganea

Beilstein J. Nanotechnol. 2018, 9, 155–163, doi:10.3762/bjnano.9.18

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Figure 1: Schematic representation of morphology and working principle of the electrospun cellulose network w...

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Figure 2: SEM image of deposited electrospun CA fibers.

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Figure 3: Polarizing optical microscopy images of the electrospun CA a) without LC and (b) filled with E7.

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Figure 4: Dielectric constant and dielectric loss (logarithmic scale) as functions of the temperature for (a)...

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Figure 5: Dielectric constant and dielectric loss (logarithmic scale) as functions of the frequency for (a) t...

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Figure 6: Relaxation time as a function of the inverse of temperature for the CA/E7 sample.

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Figure 7: Active and reactive part of the impedance as functions of the frequency, for (a) the CA cell and fo...

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Figure 8: Normalized reactive part of the impedance as a function of the frequency for (a) the CA cell and fo...

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Figure 9: Cole–Cole diagrams for (a) the CA cell at 303 K (black solid squares), 313 K (red solid circles), a...

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Figure 10: Equivalent three-element model circuit, formed by a serial resistance, R_s, a parallel resistance, R_p...

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Figure 11: Optical transmission of the sample CA/E7 as a function of the applied ac electric field.

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Figure 12: Schematic representation of electrospinning cellulose fibers from solution.

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Figure 13: Experimental set-up for the optical transmission measurement.

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Full Research Paper

Published 15 Jan 2018

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