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Mechanically-gated electrochemical ionic channels with chemically modified vertically aligned gold nanowires
Qingfeng Zhai1,2, Ren Wang1,2, Quanxia Lyu1,2
1Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia.
Iscience
|November 12, 2021
Summary
Researchers developed a mechanically-gated electrochemical channel using stretchable gold nanowire electrodes. Applying strain controls ionic transport and redox reactions, enabling potential applications in soft mechanotransduction devices.
Area of Science:
- Electrochemistry
- Materials Science
- Nanotechnology
Background:
- Mechanically-gated ion channels are crucial in biology.
- Designing artificial mechanically-controlled ionic transport is challenging due to electrode rigidity.
Purpose of the Study:
- To create a mechanically-gated electrochemical channel using 3D stretchable electrodes.
- To demonstrate strain-controlled ionic transport and redox reactions.
Main Methods:
- Utilized vertically aligned gold nanowires (v-AuNWs) as stretchable electrodes.
- Surface-modified v-AuNWs with 1-Dodecanethiol to create hydrophobic barriers.
- Applied mechanical strain to induce channel unzipping/cracking and enable redox reactions.
Main Results:
- Achieved mechanically-controlled ionic transport and redox reactions.
- Redox current increased with strain up to a threshold, then decreased.
- Demonstrated reversible "on-off" behavior over multiple cycles.
Conclusions:
- A novel strategy for controlling redox reactions using tensile strain was developed.
- The mechanically-gated electrochemical channel shows potential for soft smart mechanotransduction devices.
