Printing two-dimensional gallium phosphate out of liquid metal

Syed, N, Zavabeti, S, Ou, J, Mohiuddin, M, Pillai, N, Carey, B, Zhang, B, Datta, R, Jannat, A, Haque, F, Messalea, K, Xu, C, Russo, S, McConville, C, Daeneke, T and Kalantar Zadeh, K 2018, 'Printing two-dimensional gallium phosphate out of liquid metal', Nature Communications, vol. 9, no. 1, pp. 1-10.

Document type: Journal Article
Collection: Journal Articles

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Title Printing two-dimensional gallium phosphate out of liquid metal
Author(s) Syed, N
Zavabeti, S
Ou, J
Mohiuddin, M
Pillai, N
Carey, B
Zhang, B
Datta, R
Jannat, A
Haque, F
Messalea, K
Xu, C
Russo, S
McConville, C
Daeneke, T
Kalantar Zadeh, K
Year 2018
Journal name Nature Communications
Volume number 9
Issue number 1
Start page 1
End page 10
Total pages 10
Publisher Nature
Abstract Two-dimensional piezotronics will benefit from the emergence of new crystals featuring high piezoelectric coefficients. Gallium phosphate (GaPO4) is an archetypal piezoelectric material, which does not naturally crystallise in a stratified structure and hence cannot be exfoliated using conventional methods. Here, we report a low-temperature liquid metal-based two-dimensional printing and synthesis strategy to achieve this goal. We exfoliate and surface print the interfacial oxide layer of liquid gallium, followed by a vapour phase reaction. The method offers access to large-area, wide bandgap two-dimensional (2D) GaPO4 nanosheets of unit cell thickness, while featuring lateral dimensions reaching centimetres. The unit cell thick nanosheets present a large effective out-of-plane piezoelectric coefficient of 7.5 ± 0.8 pm/V. The developed printing process is also suitable for the synthesis of free standing GaPO4 nanosheets. The low temperature synthesis method is compatible with a variety of electronic device fabrication procedures, providing a route for the development of future 2D piezoelectric materials.
Subject Functional Materials
Keyword(s) Piezoresponse Force Microscopy
Quartz-Like Material
DOI - identifier 10.1038/s41467-018-06124-1
Copyright notice © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License
ISSN 2041-1723
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Citation counts: TR Web of Science Citation Count  Cited 25 times in Thomson Reuters Web of Science Article | Citations
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