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Multicore-based ferrofluids in zero field: initial magnetic susceptibility and self-assembly mechanisms

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Заглавие Multicore-based ferrofluids in zero field: initial magnetic susceptibility and self-assembly mechanisms
 
Автор Kuznetsov, A. A.
Novak, E. V.
Pyanzina, E. S.
Kantorovich, S. S.
 
Тематика MAGNETIC FLUIDS
MAGNETIC MOMENTS
MEDICAL APPLICATIONS
NANOFLUIDICS
NANOMAGNETICS
SELF ASSEMBLY
SUSPENSIONS (FLUIDS)
ASSEMBLY MECHANISM
BIOMEDICAL APPLICATIONS
BUILDING BLOCKES
MAGNETIC INTERACTIONS
MAGNETIC RESPONSE
MULTI-CORES
NANO-STRUCTURED
NANOPARTICLES SUSPENSION
SOFTER MATERIALS
ZERO FIELDS
MAGNETIC SUSCEPTIBILITY
 
Описание The necessity to improve magnetic building blocks in magnetic nano-structured soft materials stems from a fascinating potential these materials have in bio-medical applications and nanofluidics. Along with practical reasons, the interplay of magnetic and steric interactions on one hand, and entropy, on the other, makes magnetic soft matter fundamentally challenging. Recently, in order to tailor magnetic response of the magnetic particle suspensions, the idea arose to replace standard single-core nanoparticles with nano-sized clusters of single-domain nanoparticles (grains) rigidly bound together by solid polymer matrix - multicore magnetic nanoparticles (MMNPs). To pursue this idea, a profound understanding of the MMNP interactions and self-assembly is required. In this work we present a computational study of the MMNP suspensions and elucidate their self-assembly and magnetic susceptibility. We show that depending on the magnetic moment of individual grains the suspensions exhibit qualitatively distinct regimes. Firstly, if the grains are moderately interacting, they contribute to a significant decrease of the remanent magnetisation of MMNPs and as such to a decrease of the magnetic susceptibility, this way confirming previous findings. If the grains are strongly interacting, instead, they serve as anchor points and support formation of grain clusters that span through several MMNPs, leading to MMNP cluster formation and a drastic increase of the initial magnetic response. Both the topology of the clusters and their size distribution in MMNP suspensions is found to be notably different from those formed in conventional magnetic fluids or magnetorheological suspensions. © 2023 The Royal Society of Chemistry
Russian Science Foundation, RSF: 19-72-10033, SAM P 33748
This research has been supported by the Russian Science Foundation Grant No. 19-72-10033. S. S. K. was partially supported by Project SAM P 33748. Computer simulations were performed at the Ural Federal University cluster.
 
Дата 2024-04-05T16:26:20Z
2024-04-05T16:26:20Z
2023
 
Тип Article
Journal article (info:eu-repo/semantics/article)
|info:eu-repo/semantics/publishedVersion
 
Идентификатор Kuznetsov, AA, Novak, EV, Pyanzina, ES & Kantorovich, SS 2023, 'Multicore-based ferrofluids in zero field: initial magnetic susceptibility and self-assembly mechanisms', Soft Matter, Том. 19, № 24, стр. 4549-4561. https://doi.org/10.1039/D3SM00440F
Kuznetsov, A. A., Novak, E. V., Pyanzina, E. S., & Kantorovich, S. S. (2023). Multicore-based ferrofluids in zero field: initial magnetic susceptibility and self-assembly mechanisms. Soft Matter, 19(24), 4549-4561. https://doi.org/10.1039/D3SM00440F
1744-683X
Final
All Open Access, Hybrid Gold, Green
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85163435634&doi=10.1039%2fd3sm00440f&partnerID=40&md5=1ba5a2fd52cc2d498c087fa40777e8b4
https://pubs.rsc.org/en/content/articlepdf/2023/sm/d3sm00440f
http://elar.urfu.ru/handle/10995/130575
10.1039/d3sm00440f
85163435634
001003303700001
 
Язык en
 
Связанные ресурсы info:eu-repo/grantAgreement/RSF//19-72-10033
 
Права Open access (info:eu-repo/semantics/openAccess)
cc-by
https://creativecommons.org/licenses/by/4.0/
 
Формат application/pdf
 
Издатель Royal Society of Chemistry
 
Источник Soft Matter
Soft Matter