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Article

Impact of the Liquid Crystal Order of Poly(azomethine-sulfone)s on the Semiconducting Properties

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“Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, 700487 Iasi, Romania
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Department of Biophysics and Medical Physics, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
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Department of Emergency Medicine, Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
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Department of Pharmaceutical Sciences, Faculty of Pharmacy, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania
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National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Bucharest, Romania
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Department of Physics, “Gh. Asachi” Technical University of Iasi, 700050 Iasi, Romania
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Romanian Scientists Academy, 54 Splaiul Independentei, 050094 Bucharest, Romania
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Faculty of Biology, “Alexandru Ioan Cuza” University of Iasi, 2A Carol Boulevard, 700505 Iasi, Romania
*
Authors to whom correspondence should be addressed.
Academic Editor: Mohammed M. Rahman
Polymers 2022, 14(7), 1487; https://doi.org/10.3390/polym14071487
Received: 8 March 2022 / Revised: 29 March 2022 / Accepted: 30 March 2022 / Published: 6 April 2022
(This article belongs to the Special Issue Conducting Polymer Nanocomposites and Their Potential Applications)
Organic semiconductors are an attractive class of materials with large application in various fields, from optoelectronics to biomedicine. Usually, organic semiconductors have low electrical conductivity, and different routes towards improving said conductivity are being investigated. One such method is to increase their ordering degree, which not only improves electrical conduction but promotes cell growth, adhesion, and proliferation at the polymer–tissue interface. The current paper proposes a mathematical model for understanding the influence of the ordering state on the electrical properties of the organic semiconductors. To this end, a series of aromatic poly(azomethine)s were prepared as thin films in both amorphous and ordered states, and their supramolecular and electrical properties were analyzed by polarized light microscopy and surface type cells, respectively. Furthermore, the film surface characteristics were investigated by atomic force microscopy. It was established that the manufacture of thin films from mesophase state induced an electrical conductivity improvement of one order of magnitude. A mathematical model was developed in the framework of a multifractal theory of motion in its Schrodinger representation. The model used the order degree of the thin films as a fractality measure of the physical system’s representation in the multifractal space. It proposed two types of conductivity, which manifest at different ranges of fractalization degrees. The mathematical predictions were found to be in line with the empirical data. View Full-Text
Keywords: poly(azomethine); semiconducting; mesophase; biomedicine; multifractal model poly(azomethine); semiconducting; mesophase; biomedicine; multifractal model
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MDPI and ACS Style

Dumbravă, O.; Popovici, D.; Vasincu, D.; Popa, O.; Ochiuz, L.; Irimiciuc, Ș.-A.; Agop, M.; Negură, A. Impact of the Liquid Crystal Order of Poly(azomethine-sulfone)s on the Semiconducting Properties. Polymers 2022, 14, 1487. https://doi.org/10.3390/polym14071487

AMA Style

Dumbravă O, Popovici D, Vasincu D, Popa O, Ochiuz L, Irimiciuc Ș-A, Agop M, Negură A. Impact of the Liquid Crystal Order of Poly(azomethine-sulfone)s on the Semiconducting Properties. Polymers. 2022; 14(7):1487. https://doi.org/10.3390/polym14071487

Chicago/Turabian Style

Dumbravă, Oana, Dumitru Popovici, Decebal Vasincu, Ovidiu Popa, Lăcrămioara Ochiuz, Ștefan-Andrei Irimiciuc, Maricel Agop, and Anca Negură. 2022. "Impact of the Liquid Crystal Order of Poly(azomethine-sulfone)s on the Semiconducting Properties" Polymers 14, no. 7: 1487. https://doi.org/10.3390/polym14071487

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