The structure of clusters formed by Stockmayer supracolloidal magnetic polymers

Autor: Ekaterina V. Novak, Pedro A. Sánchez, Elena S. Pyanzina, Sofia S. Kantorovich
Rok vydání: 2019
Předmět:
DIPOLAR HARD SPHERES
Materials science
MOLECULAR DYNAMICS SIMULATIONS
Biophysics
FOS: Physical sciences
Nanoparticle
INTERNAL STRUCTURE
02 engineering and technology
Condensed Matter - Soft Condensed Matter
STOCKMAYER FLUIDS
010402 general chemistry
01 natural sciences
Molecular dynamics
SOFT SPHERES
Critical point (thermodynamics)
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
TOPOLOGY
General Materials Science
Computer Science::Distributed
Parallel
and Cluster Computing
GAS LIQUIDS
chemistry.chemical_classification
Condensed Matter - Mesoscale and Nanoscale Physics
MAGNETIC POLYMERS
Isotropy
Surfaces and Interfaces
General Chemistry
Hard spheres
Polymer
Soft Matter: Self-organisation and Supramolecular Assemblies
SELF ORGANISATION
021001 nanoscience & nanotechnology
SPHERES
0104 chemical sciences
Dipole
SELF-ORGANISATION AND SUPRAMOLECULAR ASSEMBLIES [SOFT MATTER]
chemistry
Chemical physics
CROSSLINKING
Soft Condensed Matter (cond-mat.soft)
MOLECULAR DYNAMICS
POLYMERS
0210 nano-technology
Biotechnology
Zdroj: European Physical Journal E
ISSN: 1292-895X
1292-8941
DOI: 10.1140/epje/i2019-11924-6
Popis: Abstract. Unlike Stockmayer fluids, that prove to undergo gas-liquid transition on cooling, the system of dipolar hard or soft spheres without any additional central attraction so far has not been shown to have a critical point. Instead, in the latter, one observes diverse self-assembly scenarios. Crosslinking dipolar soft spheres into supracolloidal magnetic polymer-like structures (SMPs) changes the self-assembly behaviour. Moreover, aggregation in systems of SMPs strongly depends on the constituent topology. For Y- and X-shaped SMPs, under the same conditions in which dipolar hard spheres would form chains, the formation of very large loose gel-like clusters was observed (E. Novak et al., J. Mol. Liq. 271, 631 (2018)). In this work, using molecular dynamics simulations, we investigate the self-assembly in suspensions of four topologically different SMPs --chains, rings, X and Y-- whose monomers interact via Stockmayer potential. As expected, compact drop-like clusters are formed by SMPs in all cases if the central isotropic attraction is introduced, however, their shape and internal structure turn out to depend on the SMPs topology. Graphical abstract
Databáze: OpenAIRE
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