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Updated: Jun 15, 2026

Seedless Growth of Bismuth Nanowire Array via Vacuum Thermal Evaporation
Published on: December 21, 2015
High Shear Conversion of Elemental Bismuth in Water Under Air to 2D Bismuth Oxycarbonate
Fayed Abdullah Alrashaidi1,2, Jason R Gascooke1, Mohammed Z Asiri1,3,4
1Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Bedford Park, Adelaide, South Australia, 5042, Australia.
Abstract:
2D Bismuth oxycarbonate (2D BOC) nanosheets have a unique layered structure with many applications, including capture and reduction of carbon dioxide. Processing powdered elemental bismuth in water under ambient air conditions using a vortex fluidic device (VFD) results in the formation of 2D BOC without the need of surfactants or other excipients. The induced high shear mechanical energy in the form of micron/submicron topological typhoon like spinning top (ST) fluid flow drives the conversion, which we propose initially melts the metal particles which are spontaneously oxidised at the liquid-quartz tube interface to form 2D bismuth oxide (Bi2O3). Then it reacts with atmospheric CO2 to form 2D BOC. These sheets, ≤ 15.7 nm thick, are in the orthorhombic phase with a lattice spacing of 0.29 nm, which is converted to Bi2O3 monoclinic phase as an exothermic process at 269 °C.
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