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Size‐Dependent Self‐Assembly of Anisotropic Silica‐Coated Hybrid Nanoparticles
Author(s) -
Estupiñán Diego,
Bannwarth Markus B.,
Landfester Katharina,
Crespy Daniel
Publication year - 2015
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201500239
Subject(s) - self assembly , nanoparticle , polymer chemistry , materials science , anisotropy , chemical engineering , polymer science , nanotechnology , optics , physics , engineering
The self‐organization of colloids into defined structures offers the possibility to develop novel materials with exciting properties. However, this requires the understanding and application of the forces governing interparticle association. A novel approach for a size‐dependent anisotropic assembly between nanoparticles is achieved. Janus‐like iron oxide/polystyrene hybrid nanocolloids are prepared by heterophase polymerization and selectively coated with silica on the iron oxide face to gradually form a cavity. Hence, a shallow surface around the hydrophobic polymer face is created, enabling smaller particles of the same nature to be locked by shape complementarity and colloidal steric stabilization. Further coating with silica fixes these assemblies and allows quantitative analysis of the interaction on a nanoscale.