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Media type:
E-Article;
Text
Title:
Stimuli-Responsive Particle-Based Amphiphiles as Active Colloids Prepared by Anisotropic Click Chemistry
Contributor:
Lanz, Cornelia
[Author];
Schlötter, Moritz
[Author];
Klinkenberg, Nele
[Author];
Besirske, Patricia
[Author];
Polarz, Sebastian
[Author]
imprint:
Weinheim : Wiley-VCH, 2020
Published in:Angewandte Chemie International Edition (Formerly: Angewandte Chemie: International Edition in English) 59 (2020), Nr. 23 ; Angewandte Chemie International Edition (Formerly: Angewandte Chemie: International Edition in English)
Footnote:
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Description:
Amphiphiles alter the energy of surfaces, but the extent of this feature is typically constant. Smart systems with amphiphilicity as a function of an external, physical trigger are desirable. As a trigger, the exposure to a magnetic field, in particular, is attractive because it is not shielded in water. Amphiphiles like surfactants are well known, but the magnetic response of molecules is typically weak. Vice-versa, magnetic particles with strong response to magnetic triggers are fully established in nanoscience, but they are not amphiphilic. In this work colloids with Janus architecture and ultra-small dimensions (25 nm) have been prepared by spatial control over the thiol-yne click modification of organosilica-magnetite core–shell nanoparticles. The amphiphilic properties of these anisotropically modified particles are proven. Finally, a pronounced and reversible change in interfacial stabilization results from the application of a weak (<1 T) magnetic field.