Journal article

Printing two-dimensional gallium phosphate out of liquid metal

Nitu Syed, Ali Zavabeti, Jian Zhen Ou, Md Mohiuddin, Naresh Pillai, Benjamin J Carey, Bao Yue Zhang, Robi S Datta, Azmira Jannat, Farjana Haque, Kibret A Messalea, Chenglong Xu, Salvy P Russo, Chris F McConville, Torben Daeneke, Kourosh Kalantar-Zadeh

NATURE COMMUNICATIONS | NATURE PUBLISHING GROUP | Published : 2018

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 rea..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council, Centre of Excellence for Future Low-Energy Electronics Technologies


Funding Acknowledgements

We thank the facilities and technical assistance of the RMIT Micro Nano Research Facility (MNRF) and the assistance of RMIT Microscopy and Microanalysis Facility (RMMF). The authors would also like to thank the Australian Research Council, Centre of Excellence for Future Low-Energy Electronics Technologies (FLEET-CE170100039) for financial support. This work was also supported by computational resources provided by the Australian Government through the National Computational Infrastructure National Facility and the Pawsey Supercomputer Centre.