Details
| Original language | English |
|---|---|
| Pages (from-to) | 8902-8906 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 59 |
| Issue number | 23 |
| Publication status | Published - 11 Mar 2020 |
Abstract
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.
Keywords
- Janus nanoparticles, active colloids, core–shell structures, magnetite nanoparticles, smart materials
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- General Chemistry
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In: Angewandte Chemie - International Edition, Vol. 59, No. 23, 11.03.2020, p. 8902-8906.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Stimuli‐responsive particle‐based amphiphiles as active colloids prepared by anisotropic click chemistry
AU - Lanz, Cornelia Elisabeth
AU - Schlötter, Moritz
AU - Klinkenberg, Nele
AU - Besirske, Patricia
AU - Polarz, Sebastian
N1 - Funding information: The current research was funded by an ERC consolidator grant (I-SURF; project 614606). We thank J. Brunner und C. Jenewein for the synthesis of the magnetite particles. We gratefully acknowledge technical/instrumental support from the German Research Foundation (DFG) via SFB1214 Project Z1 Particle Analysis Center and the Nanolab of the University of Konstanz.
PY - 2020/3/11
Y1 - 2020/3/11
N2 - 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.
AB - 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.
KW - Janus nanoparticles
KW - active colloids
KW - core–shell structures
KW - magnetite nanoparticles
KW - smart materials
UR - http://www.scopus.com/inward/record.url?scp=85082185754&partnerID=8YFLogxK
U2 - 10.1002/anie.202001423
DO - 10.1002/anie.202001423
M3 - Article
C2 - 32157801
VL - 59
SP - 8902
EP - 8906
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 0044-8249
IS - 23
ER -