Role of ionic surfactant in magnetic dynamics of self-assembled dispersions of nanoplatelets

Hajnalka Nádasi; Melvin Küster; Alenka Mertelj; Nerea Sebastián; Patricija Hribar Boštjančič; Darja Lisjak; Thilo Viereck; Margaret Rosenberg; Alexey O. Ivanov; Sofia S. Kantorovich; Alexey Eremin; Frank Ludwig

doi:10.1016/j.molliq.2023.121900

Role of ionic surfactant in magnetic dynamics of self-assembled dispersions of nanoplatelets

Hajnalka Nádasi (Corresponding author)
, Melvin Küster
, Alenka Mertelj
, Nerea Sebastián
, Patricija Hribar Boštjančič
, Darja Lisjak
, Thilo Viereck
, Margaret Rosenberg
, Alexey O. Ivanov
, Sofia S. Kantorovich
, Alexey Eremin
, Frank Ludwig (Corresponding author)

Computational and Soft Matter Physics

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

In complex colloidal systems, interparticle interactions strongly affect the dynamics of the constituting particles. A study of the dynamical response also provides invaluable information on the character of those interactions. Here we demonstrate how tuning the electrostatic interactions by an ionic surfactant in dispersions of magnetic nanoplatelets leads to developing new dynamic modes in magnetic response spectra. The collective modes can be induced or suppressed by either varying the concentration ratio of the magnetic nanoplatelets (MP) to the surfactant or increasing the MP concentration reflecting the nanoscale characteristics of this fluid magnet.

Original language	English
Article number	121900
Number of pages	9
Journal	Journal of Molecular Liquids
Volume	382
DOIs	https://doi.org/10.1016/j.molliq.2023.121900
Publication status	Published - 15 Jul 2023

Funding

F.L., M.K., A.E. and H.N. acknowledge the support of the Deutsche Forschungsgemeinschaft (Projects NA 1668/1-1 and LU 800/7-1 ). D.L, N.S., P.H.-B., and A.M. acknowledge the financial support from the Slovenian Research Agency ( P1-0192 , P2-0089 , J1-2459 , PR-08973 and PR-08415 ). M.R. thanks the Austrian Academy of Sciences for funding via the DOC-Fellowship program.

Austrian Fields of Science 2012

103017 Magnetism
103043 Computational physics
103015 Condensed matter

Keywords

AC susceptometry
Barium hexaferrite
Ferromagnetic nematics
Magnetic dynamics
Magnetic nanoplatelets
Soft matter

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10.1016/j.molliq.2023.121900

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Nádasi, H., Küster, M., Mertelj, A., Sebastián, N., Hribar Boštjančič, P., Lisjak, D., Viereck, T., Rosenberg, M., Ivanov, A. O., Kantorovich, S. S., Eremin, A., & Ludwig, F. (2023). Role of ionic surfactant in magnetic dynamics of self-assembled dispersions of nanoplatelets. Journal of Molecular Liquids, 382, Article 121900. https://doi.org/10.1016/j.molliq.2023.121900

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abstract = "In complex colloidal systems, interparticle interactions strongly affect the dynamics of the constituting particles. A study of the dynamical response also provides invaluable information on the character of those interactions. Here we demonstrate how tuning the electrostatic interactions by an ionic surfactant in dispersions of magnetic nanoplatelets leads to developing new dynamic modes in magnetic response spectra. The collective modes can be induced or suppressed by either varying the concentration ratio of the magnetic nanoplatelets (MP) to the surfactant or increasing the MP concentration reflecting the nanoscale characteristics of this fluid magnet.",

keywords = "AC susceptometry, Barium hexaferrite, Ferromagnetic nematics, Magnetic dynamics, Magnetic nanoplatelets, Soft matter",

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T1 - Role of ionic surfactant in magnetic dynamics of self-assembled dispersions of nanoplatelets

AU - Nádasi, Hajnalka

AU - Küster, Melvin

AU - Mertelj, Alenka

AU - Sebastián, Nerea

AU - Hribar Boštjančič, Patricija

AU - Lisjak, Darja

AU - Viereck, Thilo

AU - Rosenberg, Margaret

AU - Ivanov, Alexey O.

AU - Kantorovich, Sofia S.

AU - Eremin, Alexey

AU - Ludwig, Frank

PY - 2023/7/15

Y1 - 2023/7/15

N2 - In complex colloidal systems, interparticle interactions strongly affect the dynamics of the constituting particles. A study of the dynamical response also provides invaluable information on the character of those interactions. Here we demonstrate how tuning the electrostatic interactions by an ionic surfactant in dispersions of magnetic nanoplatelets leads to developing new dynamic modes in magnetic response spectra. The collective modes can be induced or suppressed by either varying the concentration ratio of the magnetic nanoplatelets (MP) to the surfactant or increasing the MP concentration reflecting the nanoscale characteristics of this fluid magnet.

AB - In complex colloidal systems, interparticle interactions strongly affect the dynamics of the constituting particles. A study of the dynamical response also provides invaluable information on the character of those interactions. Here we demonstrate how tuning the electrostatic interactions by an ionic surfactant in dispersions of magnetic nanoplatelets leads to developing new dynamic modes in magnetic response spectra. The collective modes can be induced or suppressed by either varying the concentration ratio of the magnetic nanoplatelets (MP) to the surfactant or increasing the MP concentration reflecting the nanoscale characteristics of this fluid magnet.

KW - AC susceptometry

KW - Barium hexaferrite

KW - Ferromagnetic nematics

KW - Magnetic dynamics

KW - Magnetic nanoplatelets

KW - Soft matter

UR - https://www.scopus.com/pages/publications/85156160962

U2 - 10.1016/j.molliq.2023.121900

DO - 10.1016/j.molliq.2023.121900

M3 - Article

AN - SCOPUS:85156160962

SN - 0167-7322

VL - 382

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

M1 - 121900

ER -

Role of ionic surfactant in magnetic dynamics of self-assembled dispersions of nanoplatelets

Abstract

Funding

Austrian Fields of Science 2012

Keywords

Access to Document

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