Speaker
Description
Swift heavy ion irradiation is a powerful tool in materials research, particularly in terms of materials modification and engineering. In combination with chemical track etching and electrochemical deposition, swift heavy ion beams can be employed to synthesize high aspect ratio nanowires. This approach enables systematic investigations of size-dependent properties of nanowires, due to excellent control regarding wire diameter geometry and minimum size distribution. This contribution presents a study on the size dependence of phase transitions on nanowires under high static pressures.
High-pressure stability fields of nanomaterials can deviate significantly from their bulk counterparts, in terms of transition pressures and crystallographic structures of phases. Therefore, the investigation of size-dependent stability ranges may open up new pathways regarding the synthesis and recovery of novel materials, providing valuable insight into the impact of the sample geometry.
The present poster contribution summarizes our investigations on the size-dependent high-pressure phase transitions of bismuth nanowire networks (Bi-NWNWs) synthesized by ion track nanotechnology. The wire diameters were varied from 30 to 100 nm and the NWNWs mounted together with bulk-like microcrystals in diamond anvil cells. The samples were stepwise compressed up to 20 GPa and their crystallographic properties characterized by beams of synchrotron diffraction. Additional experimental results concerning the systematic investigation of the high-pressure behavior of Antimony NWNWs, as well as the exposure of the pressurized nanomaterials to swift heavy ion irradiation are also discussed, highlighting the various possibilities of this novel methodology.
