One-dimensional hybrid nanomaterials based on cylindrical polymer brushes
type: CreativeWork
description: Cylindrical polymer brushes (CPBs) have been synthesized via the combination of anionic polymerization (for the backbone) and atom transfer radical polymerization (for the side chains) via the "grafting from" technique to achieve a narrow molecular weight distribution in both the backbone and the side chains. They were employed as template for the preparation of various types of one-dimensional (1D) polymer-inorganic hybrid nanomaterials. In the case of well-defined core-shell superstructured CPBs, depending on the aimed func-tional 1D hybrid nanostructures, different combinations of core and shell have been chosen. CPBs with a poly(3-acryloylpropyl trimethoxysilane) core and a poly(oligo(ethylene glycol) methacrylate) (POEGMA) shell were hydrolyzed by aqueous ammonia to produce water-soluble organo-silica hybrid nanowires. Since the trimethoxysilyl group was directly incorporated into the structure of the CPB, the addition of an external inorganic precursor in this case is avoided. These hybrid nanowires can form a lyotropic phase and serve as in-situ template for the pyrolytic formation of inorganic silica nanowires. Amphiphilic CPBs with a hydrophilic poly(acrylic acid) (PAA) core and a hydrophobic poly(n-butyl acrylate) (PnBA) shell were used as cylindrical templates and nanoreactors for the fabrication of CdSe semiconductor nanowires, due to the coordination ability of PAA with Cd2+ ions. Since the chemical structure of the PAA core was resumed, a double-loading process was carried out to load more CdSe nanoparticles into the CPB. AFM, TEM and UV-Vis characteriza-tions have proven the increasing amount of CdSe in the hybrids. Bishydrophilic CPBs with a poly(2-hydroxyethyl methacrylate) (PHEMA) core and a POEGMA shell were employed for the fabrication of a wormlike assembly of TiO2 semiconductor nanoparticles, forming a kind of titania-CPB hybrid nanowires. The titanium alkoxide precursor was introduced into the CPB via a transalcoholysis reaction between Ti(OC4…
abstract: Cylindrical polymer brushes (CPBs) have been synthesized via the combination of anionic polymerization (for the backbone) and atom transfer radical polymerization (for the side chains) via the "grafting from" technique to achieve a narrow molecular weight distribution in both the backbone and the side chains. They were employed as template for the preparation of various types of one-dimensional (1D) polymer-inorganic hybrid nanomaterials. In the case of well-defined core-shell superstructured CPBs, depending on the aimed func-tional 1D hybrid nanostructures, different combinations of core and shell have been chosen. CPBs with a poly(3-acryloylpropyl trimethoxysilane) core and a poly(oligo(ethylene glycol) methacrylate) (POEGMA) shell were hydrolyzed by aqueous ammonia to produce water-soluble organo-silica hybrid nanowires. Since the trimethoxysilyl group was directly incorporated into the structure of the CPB, the addition of an external inorganic precursor in this case is avoided. These hybrid nanowires can form a lyotropic phase and serve as in-situ template for the pyrolytic formation of inorganic silica nanowires. Amphiphilic CPBs with a hydrophilic poly(acrylic acid) (PAA) core and a hydrophobic poly(n-butyl acrylate) (PnBA) shell were used as cylindrical templates and nanoreactors for the fabrication of CdSe semiconductor nanowires, due to the coordination ability of PAA with Cd2+ ions. Since the chemical structure of the PAA core was resumed, a double-loading process was carried out to load more CdSe nanoparticles into the CPB. AFM, TEM and UV-Vis characteriza-tions have proven the increasing amount of CdSe in the hybrids. Bishydrophilic CPBs with a poly(2-hydroxyethyl methacrylate) (PHEMA) core and a POEGMA shell were employed for the fabrication of a wormlike assembly of TiO2 semiconductor nanoparticles, forming a kind of titania-CPB hybrid nanowires. The titanium alkoxide precursor was introduced into the CPB via a transalcoholysis reaction between Ti(OC4…
author: Yuan, Jiayin
date published: 2009-04-02
date modified: 2026-07-27T18:49:16Z
provider: Universität Bayreuth
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Universität Bayreuth