Issue 44, 2021

Polyoxoniobates as molecular building blocks in thin films

Abstract

Niobium oxide thin films have been prepared by spin-coating aqueous solutions of tetramethylammonium salts of the isostructural polyoxometalate clusters [Nb10O28]6−, [TiNb9O28]7− and [Ti2Nb8O28]8− onto silicon wafers, and annealing them. The [Nb10O28]6− cluster yields films of Nb2O5 in the orthorhombic and monoclinic crystal phases when annealed at 800 °C and 1000 °C, respectively, whereas the [TiNb9O28]7− and [Ti2Nb8O28]8− clusters yield the monoclinic crystal phases of Ti2Nb12O29 and TiNb2O7 (titanium–niobium oxides) in different ratios. We also demonstrate a protocol for depositing successive layers of metal oxide films. Finally, we explore factors affecting the roughness of the films.

Graphical abstract: Polyoxoniobates as molecular building blocks in thin films

Supplementary files

Article information

Article type
Paper
Submitted
14 Sep 2021
Accepted
30 Sep 2021
First published
06 Oct 2021
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2021,50, 16030-16038

Polyoxoniobates as molecular building blocks in thin films

M. A. Rambaran, A. Gorzsás, M. Holmboe and C. A. Ohlin, Dalton Trans., 2021, 50, 16030 DOI: 10.1039/D1DT03116C

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