Polyoxoniobates as molecular building blocks in thin films

Mark A. Rambaran; András Gorzsás; Michael Holmboe; C. André Ohlin

doi:10.1039/d1dt03116c

Polyoxoniobates as molecular building blocks in thin films

Mark A. Rambaran, András Gorzsás, Michael Holmboe, C. André Ohlin

Umeå University

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	16030-16038
Number of pages	9
Journal	Dalton Transactions
Volume	50
Issue number	44
DOIs	https://doi.org/10.1039/d1dt03116c
Publication status	Published - 2021 Nov 28
Externally published	Yes

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10.1039/d1dt03116cLicence: CC BY-NC

1 Article

Facile In Situ Formation of Potassium Sodium Niobate (KNN) Using The Hexaniobate Polyoxometalate
Rambaran, M. A., Jacobsson, D., Lehmann, S. & Dick, K. A., 2025 Jan 20, (E-pub ahead of print) In: Chemistry: A European Journal. 11 p., e202404417.
Research output: Contribution to journal › Article › peer-review

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title = "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.",

author = "Rambaran, {Mark A.} and Andr{\'a}s Gorzs{\'a}s and Michael Holmboe and Ohlin, {C. Andr{\'e}}",

note = "Publisher Copyright: {\textcopyright} 2021 The Royal Society of Chemistry.",

year = "2021",

month = nov,

day = "28",

doi = "10.1039/d1dt03116c",

language = "English",

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T1 - Polyoxoniobates as molecular building blocks in thin films

AU - Rambaran, Mark A.

AU - Gorzsás, András

AU - Holmboe, Michael

AU - Ohlin, C. André

PY - 2021/11/28

Y1 - 2021/11/28

N2 - 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.

AB - 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.

U2 - 10.1039/d1dt03116c

DO - 10.1039/d1dt03116c

M3 - Article

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AN - SCOPUS:85119868258

SN - 1477-9226

VL - 50

SP - 16030

EP - 16038

JO - Dalton Transactions

JF - Dalton Transactions

IS - 44

ER -

Polyoxoniobates as molecular building blocks in thin films

Abstract

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Research output

Facile In Situ Formation of Potassium Sodium Niobate (KNN) Using The Hexaniobate Polyoxometalate

Cite this