Effect of nanoparticles shape on the magneto-mechanical actuation of biomolecules in magnetic fields of various configurations

• Published in: Journal of magnetism and magnetic materials 2025-02, Vol.614, p.172757, Article 172757
• Main Authors: Prishchepa, A.V., Savchenko, A.G., Chmelyuk, N.S., Nikitin, A.A., Abakumov, M.A.
• Format: Article
• Language: English
• Subjects: Cobalt ferrite; Low-frequency magnetic field; Magnetic nanoparticle; Magneto-mechanics; Rotating magnetic field
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2024.172757

•The morphology of nanoparticles and the configuration of the magnetic field make a significant contribution to the magneto-mechanical effect.•The conversion of low-frequency magnetic field energy by cubic and rod-shaped nanoparticles occurs more efficiently than by spheres.•The use of a rotating low-frequency magnetic field leads to an increase in the magneto-mechanical effect of rod-shaped nanoparticles. In this work, the influence of the morphology of cobalt ferrite nanoparticles on the process of energy conversion of low-frequency magnetic fields in various configurations was observed. It was shown that cubic and rod-shaped nanoparticles provide a greater magneto-mechanical effect on the associated molecules of oligonucleotide duplexes than spherical nanoparticles when exposed to external magnetic fields. Moreover, rotating magnetic field provides increasing magneto-mechanical effect from rod-shaped magnetic nanoparticles, which can be explained by their rotational dynamics in fields of rotating configuration.