Revolutionary Fog Harp Harnesses Water Without Chemicals

In a significant departure from conventional fog harvesting methods, researchers are exploring geometric designs instead of relying on chemical solutions. According to Boreyko, who spoke to Ars, the initial focus in this field was predominantly on nets, which were often enhanced with various chemical coatings aimed at minimizing clogging. However, Boreyko’s team discovered that simply transitioning from a net to a harp configuration, devoid of any chemical treatments, effectively addressed the clogging issue.

For laboratory prototypes, Boreyko’s team utilized 3D printed harp “strings” made from a mildly hydrophobic plastic. Yet, the harp has proven to function exceptionally well with uncoated stainless steel wires, eliminating the need for advanced coatings. The hybrid harp design can also be scaled up readily, much like traditional nets, by assembling multiple smaller harps to meet specific height requirements. Boreyko noted, “There is no limit to how big this thing could be.”

The next steps involve scaling the prototypes further and conducting outdoor tests on larger models. Boreyko is also keen to explore an electric variant of the hybrid fog harp, stating, “If you apply a voltage, it turns out you can catch even more water.” This hybrid design’s ability to prevent clogging means that a combination of electric fields and physical harvesting can maximize water collection.

While particularly effective in coastal areas with ample fog, Boreyko sees broader potential applications for efficient fog harvesters in environments such as roadways, highways, and airport landing strips, where fog can present safety challenges. He remarked, “There are even industrial chemical supply manufacturers creating things like pressurized nitrogen gas. The process cools the surrounding air into an ice fog that can drift across streets and disrupt urban areas.”

Journal of Materials Chemistry A, 2025. DOI: 10.1039/d5ta02686e  (About DOIs).