Speaker
Description
Liquid metals are functional materials that play an important role in many research fields, including medicine, electronics and synthesis of new materials [1]. Modern liquid metals, which are alloys and elements liquid at room temperature, are based on the non-toxic and safe to handle element gallium [2]. Gallium and it's alloys exhibit many unique properties such as a high degree of supercooling, large range of temperatures where they remain liquid, as well as a passivation oxide layer forming on the liquid [1].
In this work we present the data on the thermophysical properties of Al-Ga binary alloys, including its surface tension that is crucial from the point of view of surface phenomena. Moreover, in the scope of the research, nanometric oxide layers from Al-Ga alloys were obtained and characterized using optical microscopy, transmission electron microscopy, atomic force microscopy and X-ray photon spectroscopy. The surface of liquid metals containing gallium is covered with a thin oxide layer which can be harvested and transferred onto different substrates. It was determined that the layer are less than 10 nm thick and exfoliation from the liqudi phase is a suitable technique that can be used to obtain such materials from simple binary alloys.
[1] Daeneke, T., et al. "Liquid metals: fundamentals and applications in chemistry." Chemical Society Reviews 47.11 (2018): 4073-4111.
[2] Cadwallader, Lee C. Gallium safety in the laboratory. No. INEEL/CON-03-00078. Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID (US), 2003.
This work was financed by the National Science Centre Poland grant 2019/35/N/ST5/00121 “Design and characterization of nanometric oxide layers obtained from liquid metals”.
| Speaker Country | Poland |
|---|