Surface modification of gold nanoparticles with polyhedral oligomeric silsesquioxane and incorporation within polymer matrices

Abstract

A new approach to achieve polymer-mediated gold ferromagnetic nanocomposites in a polyhedral oligomeric silsesquioxane (POSS)-containing random copolymer matrix has been developed. Stable and narrow distributed gold nanoparticles modified by 3-mercaptopropylisobutyl POSS to form Au-POSS nanoparticles are prepared by two-phase liquid-liquid method. These Au-POSS nanoparticles form partial particle aggregation by blending with poly(n-butyl methacrylate) (PnBMA) homopolymer because of poor miscibility between Au-POSS and PnBMA polymer matrix. The incorporation the POSS moiety into the PnBMA main chain as a random copolymer matrix displays well-dispersed gold nanoparticles because the POSS-POSS interaction enhances miscibility between gold nanoparticles and the PnBMA-POSS copolymer matrix. This gold-containing nanocomposite exhibits ferromagnetic phenomenon at room temperature. V

Self-assembly behavior and photoluminescence property of bispyrenyl-POSS nanoparticle hybrid

“…Recently, many literatures reported that the bulky organic and inorganic hybrid POSS nanoparticles could effectively reduce the aggregations of photoluminescence units in the active layers of organic molecule and polymer light-emitting diode devices (OLED [11][12][13][14][15][16] and PLED [17][18][19][20][21][22]). Furthermore, POSS molecules can be regarded as core-shell colloids with solvated alkyl or aryl shells to disperse insoluble siloxane cores in solution [23][24][25][26][27][28][29][30]. In our previous study [31], we found the specific arrangement of alkyl POSS molecules in a crystal.…”

High‐Performance Polybenzoxazine Nanocomposites Containing Multifunctional POSS Cores Presenting Vinyl‐Terminated Benzoxazine Groups

“…The inorganic layered silicate structure of clay, however, does not permit its high dispersion in the organic polymer matrix; therefore, it is essential to pre‐treat the clay with appropriate surfactants 20–22. Recently, novel classes of organic/inorganic hybrid materials based on polyhedral oligomeric silsesquioxanes (POSS) have been developed 23–34. POSS possess an inorganic Si 8 O 12 core, which can be selectively functionalized with seven inert organic hydrocarbon groups and one reactive functional group, or with eight reactive functional groups that may undergo polymerization or cross‐linking 35–44.…”

Nanoporous Gold Film Prepared by the Epoxidation of Poly(styrene‐b‐butadiene) Diblock Copolymer Templated Micelles

“…The maximum absorption in toluene is at 532 nm for Au NPs. In the framework of the Mie theory, [18][19][20][21] the position of the maximum of the absorption band is determined by the refractive index of the medium surrounding the NPs, while the width is controlled by the particle size. Figure 4 …”