Janus Particles at Liquid−Liquid Interfaces
- 13 May 2006
- journal article
- letter
- Published by American Chemical Society (ACS) in Langmuir
- Vol. 22 (12), 5227-5229
- https://doi.org/10.1021/la060693i
Abstract
Following recent theoretical predictions, we report on the first experiments on the interfacial activity of so-called Janus nanoparticles (i.e., bifacial particles consisting of a gold and an iron oxide moiety). Using pendant drop tensiometry, we show that the amphiphilicity derived from the Janus character of the particles leads to a significantly higher interfacial activity compared to that of the respective homogeneous particles of the same size. The self-assembly of Janus particles at the hexane−water interface results in a significant decrease in the interfacial tension. Furthermore, we demonstrate control over the interfacial activity by tuning the particles' amphiphilicity via ligand-exchange reactions.Keywords
This publication has 9 references indexed in Scilit:
- Design and synthesis of Janus micro- and nanoparticlesJournal of Materials Chemistry, 2005
- Nanoacorns: Anisotropically Phase-Segregated CoPd Sulfide NanoparticlesJournal of the American Chemical Society, 2004
- Hierarchical nanoparticle assemblies formed by decorating breath figuresNature Materials, 2004
- Amphiphilic Janus Micelles with Polystyrene and Poly(methacrylic acid) HemispheresJournal of the American Chemical Society, 2003
- Formation of Amphiphilic Polyion Complex Vesicles from Mixtures of Oppositely Charged Block IonomersMacromolecules, 2003
- Janus MicellesMacromolecules, 2001
- Amphiphilic Block Copolymers in Structure-Controlled Nanomaterial HybridsAdvanced Materials, 1998
- Two-Dimensional Interfacial Colloidal CrystalsPhysical Review Letters, 1980
- XXXIII.—Note on the arsenates of lead and calciumJournal of the Chemical Society, Transactions, 1907