Highly Ordered Arrays of Nanoparticles in Large Areas from Diblock Copolymer Micelles in Hexagonal Self-Assembly

Development of various PS-b-P4VP micellar morphologies: Fabrication of inorganic nanostructures from micellar templates

“…Since water is a non-solvent for both PS and P4VP blocks, the selectivity of THF/water for both blocks is much higher than that of pure THF, so that spherical micelles would not be aggregated with neighboring micelles together. When the PS-b-P4VP copolymer was dissolved in a strongly selective solvent, toluene, and transferred to the substrate, a similar morphology was observed [23]. Spherical micelles having an average diameter of 54 nm and P4VP core of 20 nm were formed, as measured by AFM and TEM, respectively ( Fig.…”

“…As examples of spherical micelles, spherical micelles of PS-b-P4VP or polystyrene-block-poly(acrylic acid) (PSb-PAA) copolymers consisting of a P4VP or PAA core surrounded by a PS shell were formed in toluene, a selective solvent for the PS block, at well above the critical micelle concentration. These micellar thin films have been used as templates for fabricating metal nanoparticles or quantum dots, like Au, Fe 2 O 3 , ZnO, TiO 2 , Ag, and CdS [23,24].…”

Self-assembled block copolymers: Bulk to thin film

“…[441][442][443] Recently, highly ordered arrays of Au nanoparticle in large areas were successfully fabricated from block copolymer micelles. 444 Ethirajan et al fabricated ordered 2-D arrays of magnetically attractive FePt nanoparticles on a silicon substrate by a micellar approach. 445 Highly ordered arrays of silica dots, stripes and magnetic dots were also fabricated from block copolymer thin films.…”

Surface coverage and size effects on electrochemical oxidation of uniform gold nanoparticles

“…In this work, we fabricated Au NP arrays without an adlayer on ITO/glass electrode using diblock copolymer micelles. From a monolayer of diblock copolymer micelles, we obtained well aligned Au NPs that are free from agglomeration throughout the experiment [17,18]. The diameter of the Au NPs and inter-particle spacing among them were sophisticatedly tuned in the range of 4-9 nm and 30-60 nm, respectively.…”