Temperature-induced structural transitions in self-assembling magnetic nanocolloids / Kantorovich Sofia S.,Ivanov Alexey O.,Rovigatti Lorenzo,Tavares Jose M.,Sciortino Francesco // PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - 2015. - V. 17, l. 25. - P. 16601-16608.

ISSN/EISSN:

1463-9076 / 1463-9084

Type:

Article

Abstract:

With the help of a unique combination of density functional theory and computer simulations, we discover two possible scenarios, depending on concentration, for the hierarchical self-assembly of magnetic nanoparticles on cooling. We show that typically considered low temperature clusters, i.e. defect-free chains and rings, merge into more complex branched structures through only three types of defects: four-way X junctions, three-way Y junctions and two-way Z junctions. Our accurate calculations reveal the predominance of weakly magnetically responsive rings cross-linked by X defects at the lowest temperatures. We thus provide a strategy to fine-tune magnetic and thermodynamic responses of magnetic nanocolloids to be used in medical and microfluidics applications.

Author keywords:

DIPOLAR HARD-SPHERES; MONTE-CARLO; NANOPARTICLES; COLLOIDS; FERROFLUIDS; PARTICLES; FLUID; PHASE

DOI:

10.1039/c5cp01558h

Web of Science ID:

ISI:000356396300044

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	ROYAL SOC CHEMISTRY
Address	THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Language	English
EISSN	1463-9084
Keywords-Plus	DIPOLAR HARD-SPHERES; MONTE-CARLO; NANOPARTICLES; COLLOIDS; FERROFLUIDS; PARTICLES; FLUID; PHASE
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Atomic, Molecular \& Chemical
Author-Email	sofia.kantorovich@univie.ac.at
ResearcherID-Numbers	Tavares, Jose/A-2891-2009 Rovigatti, Lorenzo/K-2665-2012 Ivanov, Alexey/E-4442-2011 Physics Department, ISEL/F-6664-2010 Kantorovich, Sofia/H-4586-2011
ORCID-Numbers	Tavares, Jose/0000-0002-1509-9707 Rovigatti, Lorenzo/0000-0001-5017-2829 Ivanov, Alexey/0000-0001-8239-4039 Kantorovich, Sofia/0000-0001-5700-7009
Funding-Acknowledgement	Austrian Research Fund (FWF) {[}627-N27, M 1650-N27]; Portuguese Foundation for Science and Technology {[}EXCL/FISNAN/0083/2012, UID/FIS/00618/2013]; Ministry of Education and Science of the Russian Federation {[}02.A03.21.000, 3.12.2014/K]
Funding-Text	The research has been partially supported by Austrian Research Fund (FWF): START-Projekt Y 627-N27. L.R. acknowledges support from the Austrian Research Fund (FWF) through his Lise-Meitner Fellowship M 1650-N27. J.M.T. acknowledges financial support from the Portuguese Foundation for Science and Technology under Contracts No. EXCL/FISNAN/0083/2012 and UID/FIS/00618/2013. A.O.I. and S.S.K. are supported by the Ministry of Education and Science of the Russian Federation (Contract 02.A03.21.000, Project 3.12.2014/K). We are grateful to Michaela McCaffrey for taking pictures of magnetic balls used in the paper, and to Marcello Sega for fruitful discussions. F.S. and S.S.K. are grateful to the EU-Project: ETN-Colldense.
Number-of-Cited-References	59
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	40
Journal-ISO	Phys. Chem. Chem. Phys.
Doc-Delivery-Number	CK7FF