Fabrication of gold nanoparticles and silicon oxide corpuscles from block copolymers

Facile fabrication of amphiphilic gold nanoparticles with V-shaped brushes from block copolymers with a trithiocarbonate group as the junction.

Amphiphilic gold nanoparticles grafted with V-shaped brushes (Au-V-brushes) were prepared by grafting a polystyrene-b-poly(ethylene oxide) (PS-b-PEO) block copolymer with a trithiocarbonate group as the junction to the Au surface. The obtained Au-V-brushes were subjected to solubility test and UV-vis, FT-IR, TEM and DLS characterizations. It is found that the Au-V-brushes are soluble in both wa...

Thermally Tunable Metallodielectric Photonic Crystals from Self-assembly of Brush Block Copolymers and Gold Nanoparticles

Dr. D.-P. Song 1, C. Li 2, N. S. Colella 3, Prof. J. J. Watkins 6 Department of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, 01003, USA E-mail: [email protected] Prof. J.-H. Lee 5 Department of Mechanical and Industrial Engineering, University of Massachusetts Amherst, 160 Governors Drive, Amherst, MA 01003, USA Prof. X. Lu 4 School...

Functional Nanocomposites from Self-assembly of Block Copolymers with Nanoparticles

Gold nanoparticles functionalized with block copolymers displaying either LCST or UCST thermosensitivity in aqueous solution.

Gold nanoparticles (AuNPs) coated with a diblock copolymer composed of poly(ethylene oxide) (PEO) and poly(N,N-dimethylaminoethyl methacrylate) (PEO-b-PDMAEMA) were prepared, while their reaction with 1,3-propane sultone gave rise to quaternized PEO-b-PDMAEMA chains on AuNPs. Using pyrene as a probe equilibrated with polymer-coated AuNP aqueous solutions, the fluorescence measurement results sh...

Oxidation effect on templating of metal oxide nanoparticles within block copolymers

Amphiphilic norbornene-b-(norbornene dicarboxylic acid) diblock copolymers with different block ratios were prepared as templates for the incorporation of iron ions using an ion exchange protocol. The disordered arrangement of iron oxide particles within these copolymers was attributed to the oxidation of the iron ions and the strong interactions between iron oxide nanoparticles, particularly a...