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Template-Directed Synthesis of Silica Nanowires and Nanotubes from Cylindrical Core–Shell Polymer Brushes

Title data

Müllner, Markus ; Lunkenbein, Thomas ; Breu, Josef ; Caruso, Frank ; Müller, Axel H. E.:
Template-Directed Synthesis of Silica Nanowires and Nanotubes from Cylindrical Core–Shell Polymer Brushes.
In: Chemistry of Materials. Vol. 24 (25 April 2012) Issue 10 . - pp. 1802-1810.
ISSN 1520-5002
DOI: https://doi.org/10.1021/cm300312g

Abstract in another language

We report the synthesis and characterization of core-degradable core–shell cylindrical polymer brushes (CPBs) that can be used as a molecular soft template for the fabrication of uniform one-dimensional silica nanostructures with tunable dimensions and morphologies. The silica nanostructures were templated from CPBs consisting of a densely grafted poly(ε-caprolactone) core and a poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) shell. According to the degree of polymerization of both the backbone and the side chains, silica nanostructures with varying lengths and diameters were obtained. The weak polyelectrolyte shell acted as an ideal nanoreactor for the deposition of silica. Calcination or treatment with an acid of the as-synthesized silica hybrids led to the removal of the core and consequently to hollow silica nanotubes. Calcined nanotubes were microporous and exhibited high pore volumes and high specific surface areas. Furthermore, metal salts immobilized within the PDMAEMA shell can be fully embedded into the silica shell. Accessibility of the embedded nanoparticles was demonstrated via the catalysis of the reduction of 4-nitrophenol by sodium borohydride in the presence of nanoparticle-doped silica hybrids.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: cylindrical polymer brushes; silica; hybrid nanostructures; nanowires; nanotubes; nanoparticles; catalysis
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I > Chair Anorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie > SFB 840 - TP A 6
Graduate Schools > Elite Network Bavaria > Struktur, Reaktivität und Eigenschaften Oxidischer Materialien
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I
Research Institutions
Research Institutions > Collaborative Research Centers, Research Unit
Graduate Schools
Graduate Schools > Elite Network Bavaria
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 22 Mar 2018 06:52
Last Modified: 22 Mar 2018 06:52
URI: https://eref.uni-bayreuth.de/id/eprint/9820