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    Properties of DNA-CTMA monolayers obtained by Langmuir-Blodgett technique

    Year: 2021

    Journal: Mater. Sci. Eng. B-Adv. Funct. Solid-State Mater., Volume 263, JAN

    Authors: Radko, Aleksandra; Niziol, Jacek; Makyla-Juzak, Katarzyna; Ekiert, Robert; Gorska, Natalia; Gorecki, Andrzej; Marzec, Monika

    Organizations: Ministry of Science and Higher Education in Poland [7150/E-338/M/2017]; European Regional Development Fund [POIG.02.01.00-12-023/08]

    Keywords: Deoxyribonucleic acid; DNA-CTMA complex; Organic electronics; Self-assembly; Thin films; Langmuir-Blodgett technique

    The complex consisting of DNA and cetyltrimethylammonium chloride (DNA-CTMA) is extensively exploited in organic electronics in form of thin films with submicron or nanometer thickness. In this work, using the Langmuir-Blodgett technique, the surface films were prepared from complexes based on different types of chromosomal and plasmid DNA. The research focused on changes in their continuity after they were transferred onto a solid substrate. It was found that only the monolayer of plasmid DNA-CTMA complex remained continuous after being transferred. The other complexes underwent a spontaneous self-assembling and created elongated linear patterns. AFM images of these patterns were analysed quantitatively with Fast Fourier Transform. It was confirmed that self-assembling occurred along one privileged direction.
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