Scattering properties and internal structure of magnetic filament brushes
| Autor: | Pedro A. Sánchez, Elena S. Pyanzina, Joan J. Cerdà, Tomàs Sintes, Sofia S. Kantorovich |
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| Přispěvatelé: | Ministry of Education and Science of the Russian Federation, Austrian Science Fund, Russian Foundation for Basic Research, European Commission, German Research Foundation, Govern de les Illes Balears, Ministerio de Economía y Competitividad (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
education Nanoparticle Nanotechnology 02 engineering and technology macromolecular substances 010402 general chemistry 01 natural sciences Protein filament Perpendicular Anisotropy health care economics and organizations chemistry.chemical_classification Quantitative Biology::Biomolecules Condensed matter physics Scattering General Chemistry Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure equipment and supplies 0104 chemical sciences Magnetic field Condensed Matter::Soft Condensed Matter Chemistry chemistry 0210 nano-technology human activities |
| Zdroj: | Soft Matter Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Practical applications of polymer brush-like systems rely on a clear understanding of their internal structure. In the case of magnetic nanoparticle filament brushes, the competition between bonding and nonbonding interactions—including long range magnetic dipole–dipole interactions—makes the microstructure of these polymer brush-like systems rather complex. On the other hand, the same interactions open up the possibility to manipulate the meso- and macroscopic responses of these systems by applying external magnetic fields or by changing the background temperature. In this study, we put forward an approach to extract information about the internal structure of a magnetic filament brush from scattering experiments. Our method is based on the mapping of the scattering profiles to the information about the internal equilibrium configurations of the brushes obtained from computer simulations. We show that the structure of the magnetic filament brush is strongly anisotropic in the direction perpendicular to the grafting surface, especially at low temperatures and external fields. This makes slice-by-slice scattering measurements a technique very useful for the study of such systems. This research has been partially supported by the Austrian Research Fund (FWF): START-Projekt Y 627-N27. The authors are grateful to the Ministry of Education and Science of the Russian Federation (Project No. 3.1438.2017/PP). S. S. K. is supported by RFBR mol-a-ved 15-32-20549. E. S. P. acknowledges the support of President RF Grant no. MK-7131.2015.2. The authors also acknowledge the EU-Project 642774 ETN-Colldense and the grants RFBR grant 16-52-12008 and DFG Ref. no. OD 18/24-1. J. J. C. and T. S. acknowledge funding from a grant awarded by the Conselleria d'Innovació, Recerca i Turisme del Govern de les Illes Balears and the European Social Fund (ESF). T. S. also acknowledges financial support from Ministerio de Economía y Competitividad and the European Regional Development Fund, Project no. FIS20015-63628-C2-2-R (AEI/FEDER,UE). |
| Databáze: | OpenAIRE |
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