Peer-reviewed veterinary case report
A Dual-Layer Janus Mesh-Wedge Microgroove Surface for Spontaneous Departure and Directional Transport of Condensate.
By Liu L et al.·2026·School of Chemistry and Chemical Engineering, China·View original on Europe PMC →
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Plain-English summary
This research focuses on improving surfaces that help with condensation, which is important for things like cooling systems and energy production. The scientists created a new type of surface made of two layers: a slippery copper mesh on top and a specially shaped grooved layer underneath. This design allows water droplets to leave the surface more easily, regardless of gravity, which is a big improvement over traditional surfaces. They found that this new surface can enhance heat transfer significantly, making it much more efficient than existing options. Overall, the new surface design shows great promise for better cooling systems in electronics.
Abstract
Sustainable dropwise condensation technology is crucial for applications in high-performance thermal management, energy conversion, and desalination. However, conventional condensation surfaces often suffer from low droplet departure efficiency and gravity dependence, limiting their practical application in advanced heat exchangers. Here, we report a dual-layer composite surface, composed of a slippery Janus copper mesh and a wedge-shaped microgrooved substrate (SJM-WM), which enables gravity-independent droplet departure via interfacial transport. This design spatially decouples vapor condensation on the upper Janus mesh and droplet transport in the lower substrate, leveraging synergistic wettability gradients and Laplace pressure-driven directional flow. By tailoring mesh pore size, the Laplace pressure and droplet coalescence dynamics are effectively regulated, achieving a small droplet departure diameter of 98 ± 2 μm, which is comparable to the bouncing-off behavior on superhydrophobic surfaces. The SJM-WM surface enhances condensation heat transfer by 23.1% and 102.4% compared to state-of-the-art hydrophobic-superhydrophilic wedge-grooved surfaces (HB-SHL) and hydrophobic copper mesh-wedged microgroove composite surfaces (HBM-WM), respectively. This work provides a promising strategy for advancing high-performance thermal management systems in power-dense electronics.
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Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/41549906