Heijnen, SMF;
van Vliet, P;
Kuipers, BWM;
Philipse, AP;
Petukhov, A;
Ouhajji, S;
(2021)
Depletion-Induced Chiral Chain Formation of Magnetic Spheres.
Materials
, 14
(3)
, Article 507. 10.3390/ma14030507.
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Abstract
Experimental evidence is presented for the spontaneous formation of chiral configurations in bulk dispersions of magnetized colloids that interact by a combination of anisotropic dipolar interactions and isotropic depletion attractions. The colloids are superparamagnetic silica spheres, magnetized and aligned by a carefully tuned uniform external magnetic field; isotropic attractions are induced by using poly(ethylene oxide) polymers as depleting agents. At specific polymer concentrations, sphere chains wind around each other to form helical structures–of the type that previously have only been observed in simulations on small sets of unconfined dipolar spheres with additional isotropic interactions.
| Type: | Article |
|---|---|
| Title: | Depletion-Induced Chiral Chain Formation of Magnetic Spheres |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/ma14030507 |
| Publisher version: | https://doi.org/10.3390/ma14030507 |
| Language: | English |
| Additional information: | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited |
| Keywords: | Chirality; depletion-interaction; superparamagnetic colloids |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10136763 |
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