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Terpolymer Multicompartment Nanofibers as Templates for Hybrid Pt Double Helices

Title data

Tjaberings, Stefanie ; Heidelmann, Markus ; Tjaberings, Alexander ; Steinhaus, Andrea ; Franzka, Steffen ; Walkenfort, Bernd ; Gröschel, André H.:
Terpolymer Multicompartment Nanofibers as Templates for Hybrid Pt Double Helices.
In: ACS Applied Materials & Interfaces. Vol. 12 (2020) Issue 35 . - pp. 39586-39594.
ISSN 1944-8252

Abstract in another language

Hybrid inorganic/block copolymer (BCP) materials have become increasingly relevant for application in heterogeneous catalysis, microelectronics, and nanomedicine. While block copolymer templates are widely used for the formation of inorganic nanostructures, multicompartment templates could give access to more complex shapes and inner structures that are challenging to obtain with traditional processes. Here, we report the formation and characterization of hybrid platinum/polymer helices using multicompartment nanofibers (MCNFs) of polystyrene-block-polybutadiene-block-poly(tert-butyl methacrylate) (PS-b-PB-b-PT) triblock terpolymers as templates. Cross-linking of a PS-b-PB-b-PT helix-on-cylinder morphology resulted in uniform nanofibers with a diameter of 90 nm and a length of several micrometers, as well as an inner PB double helix (diameter 35 nm, pitch 25 nm, core 12 nm). The PB double helix served as template for the sol–gel reaction of H2PtCl6 into hybrid Pt double helices (Pt@MCNFs) as verified by STEM, electron tomography, AFM, and SEM. Carbonization of the Pt hybrids into Pt decorated carbon nanofibers (Pt@C) was followed in situ on a TEM heating state. Gradual heating from 25 to 1000 °C induced fusion of amorphous Pt NPs into larger crystalline Pt NP, which sheds light on the aging of Pt NPs in BCP scaffolds under high temperature conditions. The Pt@MCNFs were further sulfonated and incorporated into a filter to catalyze a model compound in a continuous flow process.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: ABC triblock terpolymers; heterogeneous catalysis; hybrid materials; multicompartment nanostructures; in situ TEM
Institutions of the University: Research Institutions > Central research institutes > Bayerisches Zentrum für Batterietechnik - BayBatt
Research Institutions
Research Institutions > Central research institutes
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Polymer Materials for Electrochemical Storage > Chair Polymer Materials for Electrochemical Storage - Univ.-Prof. Dr. André Gröschel
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 28 Jul 2023 07:17
Last Modified: 02 Aug 2023 07:53