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Orientational behavior of a nematic liquid crystal and its composite with quantum dots in a microfluidic channel

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Abstract

The behavior of a nematic liquid crystal (LC) and its composite with CdSe/CdS quantum dots in a microfluidic channel was studied. It is shown that the mesophase molecules can be aligned both along the microchannel axis and perpendicularly to it depending on the LC flow rate. A correlation between the average flow rate in the microchannel and aggregation of quantum dots in the composite is found, as well as the influence of the change in the average flow rate on these effects is revealed. The transition between aligned and nonaligned states is found to occur in a narrow range of flow rates of ca. 50–100 µm s−1. The revealed behavior of the studied systems makes it possible to control properties of the liquid crystal—quantum dot composites in microfluidic lab-on-a-chip devices.

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Funding

The work was performed using the equipment of the Center of Collective Usage “Nanotechnologies and Nanomaterials” of the Kazan National Research Technological University. The authors are grateful to the staff of the laboratory of microscopy of the Institute of Biochemistry and Biophysics of the Kazan Scientifi c Center of the Russian Academy of Sciences for carrying out studies on a fluorescent microscope.

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Authors and Affiliations

  1. Kazan National Research Technological University, 68 ul. Karla Marksa, 420015, Kazan, Russia

    A. N. Bezrukov, V. V. Osipova & Yu. G. Galyametdinov

Authors
  1. A. N. Bezrukov
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  2. V. V. Osipova
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  3. Yu. G. Galyametdinov
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Corresponding author

Correspondence to A. N. Bezrukov.

Additional information

Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2092–2097, October, 2022.

No human or animal subjects were used in this research.

The authors declare no competing interests.

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Bezrukov, A.N., Osipova, V.V. & Galyametdinov, Y.G. Orientational behavior of a nematic liquid crystal and its composite with quantum dots in a microfluidic channel. Russ Chem Bull 71, 2092–2097 (2022). https://doi.org/10.1007/s11172-022-3631-y

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  • DOI: https://doi.org/10.1007/s11172-022-3631-y

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