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Macroscopic Alignment of Micellar Crystals with Magnetic Microshearing
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.ORCID iD: 0000-0001-6066-4616
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.ORCID iD: 0000-0002-7517-8204
2019 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 35, no 11, p. 3980-3986Article in journal (Refereed) Published
Abstract [en]

The effect of small quantities of a magnetic polymer nanocomposite (formed by surfactant Pluronic @ F127 Fe3O4 nanoparticles of 10 and 30 nm diameters) on the crystallization behavior of Pluronic F127 micelles solvated by 20% in water was investigated in the vicinity of hydrophilic and hydrophobic interfaces. Introducing magnetic nanoparticle at the core imparts magnetic properties to the polymeric micelle and increases its hydrodynamic diameter. These magnetic polymer nanocomposites act as defects in the pluronic crystal and hinder crystallization in comparison to pure Pluronic F127 micelles' behavior. The magnetic field results in a motion of the magnetic micelles and a microshearing effect. This microshearing assists in self-organization of the crystal. Addition of magnetic micelles formed using 30 nm magnetite particles shows similar crystallization behavior, however, with an overall reduced crystallinity due to their significantly larger size compared to the lattice parameter and the dimension of the interstitial cavity for an fcc structure.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2019. Vol. 35, no 11, p. 3980-3986
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-381588DOI: 10.1021/acs.langmuir.8b03701ISI: 000462098400012PubMedID: 30767539OAI: oai:DiVA.org:uu-381588DiVA, id: diva2:1304294
Funder
Swedish Research Council, A0505501The Swedish Foundation for International Cooperation in Research and Higher Education (STINT), IG-2011-2067Available from: 2019-04-12 Created: 2019-04-12 Last updated: 2019-04-12Bibliographically approved

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Saini, ApurveWolff, Max

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