A liquid metal reaction environment for the room-temperature synthesis of atomically thin metal oxides
Ali Zavabeti, Jian Zhen Ou, Benjamin J Carey, Nitu Syed, Rebecca Orrell-Trigg, Edwin LH Mayes, Chenglong Xu, Omid Kavehei, Anthony P O'Mullane, Richard B Kaner, Kourosh Kalantar-zadeh, Torben Daeneke
Science | AMER ASSOC ADVANCEMENT SCIENCE | Published : 2017
Two-dimensional (2D) oxides have a wide variety of applications in electronics and other technologies. However, many oxides are not easy to synthesize as 2D materials through conventional methods. We used nontoxic eutectic gallium-based alloys as a reaction solvent and co-alloyed desired metals into the melt. On the basis of thermodynamic considerations, we predicted the composition of the self-limiting interfacial oxide. We isolated the surface oxide as a 2D layer, either on substrates or in suspension. This enabled us to produce extremely thin subnanometer layers of HfO2, Al2O3, and Gd2O3 The liquid metal-based reaction route can be used to create 2D materials that were previously inaccess..View full abstract
Awarded by Australian Research Council Centre of Excellence FLEET
Supported by Australian Research Council Centre of Excellence FLEET (CE170100039). We thank RMIT University's Microscopy and Microanalysis Facility, a linked laboratory of the Australian Microscopy and Microanalysis Research Facility, for scientific and technical assistance, and the RMIT MicroNano Research Facility for associated technical support. Additional data are available in the supplementary materials. The authors declare no conflict of interest.