Self-Sustained Flow in Janus Nanochannels Discovered through Thermo-Osmosis Research

Researchers from the Beijing University of Technology have made a groundbreaking discovery in the field of nanotechnology, unveiling a self-sustained flow system in Janus nanochannels that can drive fluid flow without the need for an external pump. This innovative concept harnesses the power of thermo-osmosis, a phenomenon where fluid flow occurs in response to thermal gradients. The study suggests that this system has the potential to revolutionize various industrial applications, including energy-efficient water purification and energy conversion.

Key Takeaways:

• The research proposes a self-sustained flow system in Janus nanochannels, where one side of the channel has a high surface energy and the other side has a relatively low surface energy.
• Molecular dynamics simulations demonstrate that the fluid within the Janus nanochannel can be driven by isotropic thermo-osmotic flow without any external pump.
• The conditions required to generate self-sustained flow are presented, and the parameters affecting self-sustained flow are also discussed.
• The research emphasizes the importance of understanding self-sustained flow at the nanoscale to improve the theoretical framework of thermally driven mass flow.
• The Janus nanochannel is capable of driving fluid flow using externally generated cold or heat without the need for an additional pump.
• The study highlights the potential of this concept for emerging industrial applications such as efficient and energy-saving water purification and efficient energy conversion.
• The research was conducted by a team of scientists from the Beijing University of Technology, led by Zirui Li and including Kai Qi, Haiyang Li, Jun Wang, Yongchang Chen, and Guodong Xi.

Statistics:

• The research has been peer-reviewed and published in The Journal of Physical Chemistry B.
• The study demonstrates the potential for self-sustained flow in Janus nanochannels, attributed to the unique properties of the channels.
• According to the research, the conditions required to generate self-sustained flow include a temperature gradient and a specific surface energy difference between the two sides of the channel.

Sources:

• Self-Sustained Flow in Janus Nanochannels Based on Thermo-Osmosis. The Journal of Physical Chemistry B, 2025.
• NewsRx. Beijing University of Technology Reports Findings in Nanochannels (Self-Sustained Flow in Janus Nanochannels Based on Thermo-Osmosis). Nanotechnology Weekly. August 4, 2025; p 52.