One‐Step Approach for the Preparation of Organic‐Inorganic Janus‐Like Particles by Alkalization of Polystyrene‐block‐Poly(2‐vinylpyridine)/FeCl₃Complex Micelles

Abstract

A novel approach to organic‐inorganic Janus‐like particles based on the alkalization process of polystyrene‐block‐poly(2‐vinylpyridine) (PS‐b‐P2VP) micelles containing FeCl3 precursors in the P2VP cores in toluene is presented. It is found that by addition of a small amount of NaOH solution to a solution of the spherical PS‐b‐P2VP/FeCl3 micelles, organic‐inorganic Janus‐like particles with a produced α‐FeOOH domain on one side and PS‐b‐P2VP block copolymers on the other can be prepared. The Janus‐like nanoparticles obtained by this facile approach may have potential application in biomedical areas.

Fabrication of strawberry-like Au@CeO2 nanoparticles with enhanced catalytic activity by assembly of block copolymer composite micelles

“…However the morphology changes from spherical micelles to larger aggregates rather than vesicles without the aid of ultrasonication. 29 In this case, the structure formation involved the nucleation-growth of Au and Ce(OH) 4 NPs in alkaline conditions, and assembly of the block copolymer micelles containing the Au NPs and Ce(OH) 4 . When the autoredox reaction takes place between AuCl 4 À and Ce(OH) 3 , ultra-small Au NPs attaching on Ce(OH) 4 NPs are formed, resulting in formation of the original Au-Ce(OH) 4 hybrid nanostructures.…”

Controllable self‐assembly of polystyrene‐block‐poly(2‐vinylpyridine)

“…(a) Schematic illustration of the formation of Janus‐like nanoparticles from PS‐ b ‐P2VP/FeCl 3 micelles; (b) TEM image of Janus‐like α‐FeOOH NPs; (c) schematic representation of TiO 2 films prepared from PS ‐b‐ P2VP and hydrophilic preformed TiO 2 nano‐crystals; (d) SEM image of worm‐like TiO 2 NPs …”

“…The self‐assembly of polystyrene‐ block ‐poly(2‐vinylpyridine) (PS‐ b ‐P2VP) (Fig. (a)), a binary BCP, has been widely utilized in various applications such as templates for the synthesis of inorganic materials, high density information storage media, sensors, photo‐catalysis and photosensitive electrodes …”

A Simple Route to Asymmetric Composite Particles via Co-assembly of Block Copolymer and Inorganic Nanoparticles in Solution

“…[3] Very recently, a novel approach to organic-inorganic Janus-like particles based on the alkalization process of PS-b-P2VP/FeCl 3 micelles in toluene has also been presented. [4] To date, asymmetric particles embedding superparamagnetic materials have attracted great interest because of their potential applications. [5] However, it still remains a challenge to prepare asymmetric multicomponent magnetic inorganic/polymer composite NPs.…”