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Published in: Journal of Nanoparticle Research 6/2023

01-06-2023 | Research paper

DNA:TiO2 nanoparticle nanoassemblies: effect of temperature and nanoparticle concentration on aggregation

Authors: Evgeniya Usenko, Alexander Glamazda, Anastasiia Svidzerska, Vladimir Valeev, Anna Laguta, Sergey Petrushenko, Victor Karachevtsev

Published in: Journal of Nanoparticle Research | Issue 6/2023

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Abstract

TiO2 nanoparticles (NPs) have unique photocatalytic properties, which are used in food industries, medicine, biosensorics, and solar energy conversion. Since the toxic properties of TiO2 NPs have been insufficiently studied, additional information on the molecular mechanisms of their biological action on the structure and stability of biological macromolecules is needed, especially concerning DNA. In this work exploiting the differential UV–visible spectroscopy, the effect of the heating (from 20 to 90 °C) and concentration of TiO2 NPs ((1–3) × 104 M) on a conformation of native DNA adsorbed on TiO2 NPs in a buffer solution (pH 5) is studied. Analysis of dynamic light scattering (DLS) data for the DNA:TiO2 NP suspension revealed that when the temperature increases the separated DNA:TiO2 NP nanoassemblies form nanoaggregates. Correlation between the thermal dependency of the DLS data and thermal DNA denaturation measurements indicated that the appearance of the single-stranded unwound regions in double-stranded DNA in the suspension with temperature rise promotes the effective formation of the DNA:TiO2 NP nanoaggregates.

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Appendix
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Metadata
Title
DNA:TiO2 nanoparticle nanoassemblies: effect of temperature and nanoparticle concentration on aggregation
Authors
Evgeniya Usenko
Alexander Glamazda
Anastasiia Svidzerska
Vladimir Valeev
Anna Laguta
Sergey Petrushenko
Victor Karachevtsev
Publication date
01-06-2023
Publisher
Springer Netherlands
Published in
Journal of Nanoparticle Research / Issue 6/2023
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-023-05770-x

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