Adsorption transition of a grafted ferromagnetic filament controlled by external magnetic fields

Autor: Elena S. Pyanzina, Tomàs Sintes, Pedro A. Sánchez, Joan J. Cerdà, Ekaterina V. Novak, Sofia S. Kantorovich
Přispěvatelé: Russian Science Foundation, Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission
Rok vydání: 2020
Předmět:
Materials science
ADSORPTION
Field (physics)
ADSORPTION TEMPERATURE
FOS: Physical sciences
Field strength
MAGNETIC FIELD
Condensed Matter - Soft Condensed Matter
01 natural sciences
CONFORMATIONAL TRANSITION
010305 fluids & plasmas
Protein filament
Condensed Matter::Materials Science
Adsorption
LANGEVIN DYNAMICS
ADSORPTION TRANSITIONS
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
GRAFTING (CHEMICAL)
ARTICLE
010306 general physics
Langevin dynamics
EXTERNAL MAGNETIC FIELD
Condensed Matter - Mesoscale and Nanoscale Physics
MAGNETIC FIELDS
ADSORPTION PROCESS
Magnetic flux
Magnetic field
Condensed Matter::Soft Condensed Matter
Ferromagnetism
Chemical physics
Soft Condensed Matter (cond-mat.soft)
MOLECULAR DYNAMICS
STRUCTURAL TRANSITIONS
MAGNETIC FILAMENTS
SWITCHING MECHANISM
Zdroj: Phys. Rev. E
Physical Review E
Digital.CSIC. Repositorio Institucional del CSIC
instname
Popis: Extensive Langevin dynamics simulations are used to characterize the adsorption transition of a flexible magnetic filament grafted onto an attractive planar surface. Our results identify different structural transitions at different ratios of the thermal energy to the surface attraction strength: filament straightening, adsorption, and the magnetic flux closure. The adsorption temperature of a magnetic filament is found to be higher in comparison to an equivalent nonmagnetic chain. The adsorption has been also investigated under the application of a static homogeneous external magnetic field. We found that the strength and the orientation of the field can be used to control the adsorption process, providing a precise switching mechanism. Interestingly, we have observed that the characteristic field strength and tilt angle at the adsorption point are related by a simple power law.
This research was supported by the Russian Science Foundation, Grant No. 19-12-00209. T.S. acknowledges support by the Spanish AEI/MCI/FEDER(UE), Grant No. RTI2018-095441-B-C22, and The Maria de Maeztu R&D Program (Grant No. MDM-2017-0711). Simulations were carried out at the Vienna Scientific Cluster (VSC).
Databáze: OpenAIRE
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