受付中Zasshikai seminar 2030th, Prof. Nicola Gaston, “Atomistic self-assembly of nanostructure in liquid metals”
Mar.26
- 日時
- 2026/3/26 16:00～17:00
- 会場
- 4F Lecture room, Chemistry Main Bldg.
- 講師
- Prof. Nicola Gaston (The MacDiarmid Institute for Advanced Materials and Nanotechnology The University of Auckland, New Zealand)
- 演目
- "Atomistic self-assembly of nanostructure in liquid metals"
- 担当
- Prof. Tatsuya Tsukuda (ext. 24363), Department of Chemistry, Graduate School of Science
Abstract：
The manipulation of interatomic interactions for structural self-assembly is a seductive promise of
nanotechnology, most tantalisingly made evident by biological examples in nature. Much of the
promise of sustainability in materials science comes from the idea of such structural control being
able to be achieved at low energetic cost.
At the risk of anthropomorphising atoms, this talk will present some examples of how, by developing
an understanding of how particular atoms want to behave, we can manipulate structure by proxy.
Not through forcible manipulation of atoms, but through understanding their environmental
preferences, and how these change through many-body interactions as they assemble.
The use of low-temperature liquid metals, such as gallium, as media for the dilution of other metals
has led to an increasing variety of examples of how temperature- and concentration-dependent
interactions can be used to direct the self-assembly of nanostructure, with astonishing precision,
resulting in novel pattern formation [1]. This talk will introduce the use of ab initio molecular
dynamics for the elucidation of the mechanisms of structural formation, whether via the differential
mobility of dopant metal atoms [2], or due to the formation of structure at the surface of the liquid
metal [3]. The concentration-dependence of the alloy behaviour will also be discussed [4].
Finally, the mechanism of nanocrystal formation within liquid metals will be discussed, based on ab
initio calculations [5], giving insight into the atomistic self-assembly process.
[1] Tang, J., Lambie, S., Meftahi, N., Christofferson, A., Yang, J., Ghasemian, M., Han, J., Allioux, F., Rahim, A., Mayyas,
M., Daeneke, T., McConville, C., Steenbergen, K., Kaner, R., Russo, S., Gaston, N., Kalantar-Zadeh, K., Unique
surface patterns emerging during solidification of liquid metal alloys. Nat. Nanotech. 16, 431—439, (2021).
[2] S. Lambie, K. G. Steenbergen & N. Gaston, A mechanistic understanding of surface Bi enrichment in dilute GaBi
systems. Phys. Chem. Chem. Phys. 23, 14383—14390, (2021).
[3] J. Tang, S. Lambie, N. Meftahi, A. J. Christofferson, J. Yang, J. Han, Md. A. Rahim, M. Mayyas, M. B. Ghasemian, F.-
M. Allioux, Z. Cao, T. Daeneke, C. F. McConville, K. G. Steenbergen, R. B. Kaner, S. P. Russo, N. Gaston, and K.
Kalantar-Zadeh, Oscillatory bifurcation patterns initiated by seeded surface solidification of liquid metals. Nature
Synthesis, 1, 158—169. (2022).
[4] S. Lambie, K. G. Steenbergen, & N. Gaston, Concentration dependent alloying behaviour of liquid GaAu. Chem.
Comm., 58, 13771—13774, (2022).
[5] S. A. Idrus-Saidi, J. Tang, S. Lambie, J. Han, M. Mayyas, M. B. Ghasemian, F.-M. Allioux, S. Cai, P. Koshy, P.
Mostaghimi, K. G. Steenbergen, A. S. Barnard, T. Daeneke, N. Gaston, K. Kalantar-Zadeh, Liquid metal synthesis
solvents for metallic crystals, Science, 378, 1118—1124, (2022).
