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'Painting' nanostructured metals-playing with liquid metal
Zhenbin Wang1, Ying Wang, Hui Gao
1Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jingshi Road 17923, Jinan, 250061, P. R. China. zh_zhang@sdu.edu.cn.
Nanoscale Horizons
|April 8, 2020
Summary
Scientists developed a novel method to "paint" nanostructured metal films onto metallic foils using liquid gallium. This technique allows for large-scale, patterned fabrication of materials for advanced energy applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Fabricating large-scale, patterned nanostructured metal films remains a significant challenge in materials science.
- Existing methods often face limitations in terms of size, complexity, and cost.
Purpose of the Study:
- To introduce a groundbreaking technique for fabricating diverse nanostructured metallic films on metallic foils.
- To demonstrate the feasibility of using liquid gallium as a 'paint' for creating complex metallic nanostructures.
- To explore the potential applications of these novel materials in energy conversion and storage devices.
Main Methods:
- A liquid gallium-stimulated painting-alloying-dealloying strategy was employed.
- Seven types of nanostructured metallic films (Au, Ag, Pd, Pt, Cu, Co, Ni) were successfully fabricated.
- The process allowed for the creation of intricate patterns over large areas (up to meters).
Main Results:
- Achieved general fabrication of nanostructured metallic films on corresponding metallic foils.
- Demonstrated the ability to produce complex patterns and large-scale films without shape or size limitations.
- The resulting films exhibit nanoporous structures, self-supporting capabilities, flexibility, and high specific surface areas.
Conclusions:
- The liquid gallium-based strategy offers a versatile and scalable approach for producing advanced nanostructured metallic materials.
- These materials are highly suitable for use as robust electrodes in various electrochemical devices, including batteries and fuel cells.
- The developed technique holds significant promise for fabricating other self-supporting, flexible nanomaterials for diverse applications.
