Motion and interaction of aspirin crystals at aqueous-air interfaces
Motion and interaction of aspirin crystals at aqueous-air interfaces
Small-molecule amphiphiles such as aspirin have unique properties arising from a combination of an aromatic hydrophobic part and a hydrophilic part. We show that crystals of aspirin are capable of generating convective flows at the air–aqueous interface from both Marangoni effects (through weak surface activity) and capillarity (surface deformations). The flow-driven motion of millimeter-sized crystals was found to depend on the presence of other ions in solution as well as the distance and orientation of the crystals. The interactions lead to the formation of groups of two or more crystals that also underwent motion. The convective flows created by small amphiphile crystals might be exploited in the dynamic self-organization of particles at interfaces.
13572–13577
Bánsági, Tamás
3984187d-60fd-47f2-b6cb-f312dcedadae
Scott, Stephen K.
af27ae5b-ff62-43cb-936f-e49ff15c679c
Taylor, Annette F.
08028a29-428d-4732-b6b1-f7a93389b386
28 September 2013
Bánsági, Tamás
3984187d-60fd-47f2-b6cb-f312dcedadae
Scott, Stephen K.
af27ae5b-ff62-43cb-936f-e49ff15c679c
Taylor, Annette F.
08028a29-428d-4732-b6b1-f7a93389b386
Bánsági, Tamás, Scott, Stephen K. and Taylor, Annette F.
(2013)
Motion and interaction of aspirin crystals at aqueous-air interfaces.
Journal of Physical Chemistry B, 117 (43), .
(doi:10.1021/jp405364c).
Abstract
Small-molecule amphiphiles such as aspirin have unique properties arising from a combination of an aromatic hydrophobic part and a hydrophilic part. We show that crystals of aspirin are capable of generating convective flows at the air–aqueous interface from both Marangoni effects (through weak surface activity) and capillarity (surface deformations). The flow-driven motion of millimeter-sized crystals was found to depend on the presence of other ions in solution as well as the distance and orientation of the crystals. The interactions lead to the formation of groups of two or more crystals that also underwent motion. The convective flows created by small amphiphile crystals might be exploited in the dynamic self-organization of particles at interfaces.
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Published date: 28 September 2013
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Local EPrints ID: 499624
URI: http://eprints.soton.ac.uk/id/eprint/499624
ISSN: 1520-5207
PURE UUID: d320d435-4ae0-48b7-86f3-4424d336b2f1
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Date deposited: 27 Mar 2025 18:22
Last modified: 17 Oct 2025 02:19
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Author:
Tamás Bánsági
Author:
Stephen K. Scott
Author:
Annette F. Taylor
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