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Lanz, Cornelia [Verfasser:in]; Krysiak, Yaşar [Verfasser:in]; Liu, Xu [Verfasser:in]; Hohgardt, Manuel [Verfasser:in]; Walla, Peter Jomo [Verfasser:in]; Polarz, Sebastian [Verfasser:in]

Non-Classical Self-Assembly of Anisotropic Magneto-Organosilica Janus Particles Possessing Surfactant Properties and the Field-Triggered Breakdown of Surface Activity and Amphiphilic Properties - [published Version]

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  • Medientyp: Sonstige Veröffentlichung; E-Artikel
  • Titel: Non-Classical Self-Assembly of Anisotropic Magneto-Organosilica Janus Particles Possessing Surfactant Properties and the Field-Triggered Breakdown of Surface Activity and Amphiphilic Properties
  • Beteiligte: Lanz, Cornelia [Verfasser:in]; Krysiak, Yaşar [Verfasser:in]; Liu, Xu [Verfasser:in]; Hohgardt, Manuel [Verfasser:in]; Walla, Peter Jomo [Verfasser:in]; Polarz, Sebastian [Verfasser:in]
  • Erschienen: Weinheim : Wiley-VCH, 2023
  • Erschienen in: Small 19 (2023), Nr. 52 ; Small
  • Ausgabe: published Version
  • Sprache: Englisch
  • DOI: https://doi.org/10.15488/16281; https://doi.org/10.1002/smll.202304380
  • ISSN: 1613-6810
  • Schlagwörter: active colloids ; Janus nanostructures ; magnetic surfactants ; particle-based materials
  • Entstehung:
  • Anmerkungen: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Beschreibung: Using colloidal particles as models to understand processes on a smaller scale is a precious approach. Compared to molecules, particles are less defined, but their architecture can be more complex and so is their long-range interaction. One can observe phenomena that are unknown or much more difficult to realize on the molecular level. The current paper focuses on particle-based surfactants and reports on numerous unexpected properties. The main goal is creating an amphiphilic system with responsiveness in surface activity and associated self-organization phenomena depending on applying an external trigger, preferably a physical field. A key step is the creation of a Janus-type particle characterized by two types of dipoles (electric and magnetic) which geometrically stand orthogonal to each other. In a field, one can control which contribution and direction dominate the interparticle interactions. As a result, one can drastically change the system's properties. The features of ferrite-core organosilica-shell particles with grain-like morphology modified by click chemistry are studied in response to spatially isotropic and anisotropic triggers. A highly unusual aggregation–dissolution–reaggregation sequence w as discovered. Using a magnetic field, one can even switch off the amphiphilic properties and use this for the field-triggered breaking of multiphase systems such as emulsions.
  • Zugangsstatus: Freier Zugang