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Wood Ion Pumps Enabled by Light-Responsive MoS2-Decorated Nanocellulosic Channels
Suling Liu1, Yongxian Yao1, Xueqi Li1
1Key Laboratory of Bio-based Material Science and Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, P. R. China.
ACS Nano
|July 26, 2024
Summary
Researchers developed light-responsive ion transport using molybdenum disulfide (MoS₂) nanosheets grown on wood. This scalable biomass-based material enables uphill ion pumping and nanofluidic circuits, advancing energy conversion and membrane technologies.
Area of Science:
- Materials Science
- Nanotechnology
- Biomass Engineering
Background:
- Light-driven ion transport in nanomaterials is key for energy and membrane applications.
- Challenges exist in bulk assembly of these nanomaterials.
Purpose of the Study:
- To develop a scalable method for light-responsive ion transport using biomass.
- To fabricate MoS₂-decorated wood for nanofluidic devices.
Main Methods:
- In situ growth of MoS₂ nanosheets on scalable wood framework.
- Characterization of nanofluidic conductivity and light-responsive ion transport.
- Fabrication of ion switches, diodes, and transistors.
Main Results:
- MoS₂-decorated wood shows high nanofluidic conductivity (8.3 × 10⁻⁵ S cm⁻¹ in 1 × 10⁻⁶ M KCl).
- Achieved uphill ion pumping against a 20-fold concentration gradient using light.
- Enhanced osmotic energy conversion power density by over 12.6 times.
Conclusions:
- This work presents a facile and scalable strategy for light-controlled nanofluidic devices from biomass.
- MoS₂-decorated wood serves as a promising platform for advanced ion transport applications.
- The developed materials can be utilized as ionic elements in nanofluidic circuits.
