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Multi-stoichiometric quasi-two-dimensional WnO3n−1 tungsten oxides

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Abstract

Quasi-two-dimensional tungsten oxide structures, which nucleate by epitaxial growth on W19O55 nanowires (NW) and grow as thin platelets, were identified. Both the nanowires and the platelets accommodate oxygen deficiency by the formation of crystallographic shear planes. Stoichiometric phases, W18O53 (WO2.944), W17O50 (WO2.941), W16O47 (WO2.938), W15O44 (WO2.933), W14O41 (WO2.929), W10O29 (WO2.9), and W9O26 (WO2.889), syntactically grow inside a single platelet. These layered crystals show a new kind of polycrystallinity, where crystallographic shear planes accommodate oxygen deficiency and at the same time stabilize this multi-stoichiometric structure.

Graphical abstract: Multi-stoichiometric quasi-two-dimensional WnO3n−1 tungsten oxides

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Article information


Submitted
11 Mar 2020
Accepted
20 Jun 2020
First published
22 Jun 2020

Nanoscale, 2020, Advance Article
Article type
Paper

Multi-stoichiometric quasi-two-dimensional WnO3n−1 tungsten oxides

L. Pirker, B. Višić, S. D. Škapin, G. Dražić, J. Kovač and M. Remškar, Nanoscale, 2020, Advance Article , DOI: 10.1039/D0NR02014A

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