Desert Beetle-Inspired Superwettable Patterned Surfaces for Water Harvesting.

Area of Science:

• Materials Science
• Nanotechnology
• Environmental Science

Background:

• Climate change and water scarcity necessitate innovative water harvesting solutions.
• Nature provides biomimetic strategies for survival in arid conditions, such as water collection by the Stenocara beetle.

Purpose of the Study:

• To design and fabricate functional materials for efficient water harvesting from fog.
• To investigate the effect of patterned wettability on water collection efficiency.

Main Methods:

• Fabrication of superhydrophilic/superhydrophobic patterned surfaces on silica poly(dimethylsiloxane) (PDMS)-coated substrates using pulsed laser deposition with masks.
• Utilized platinum (Pt) nanoparticles for superhydrophilic regions and PDMS for superhydrophobic regions.
• Evaluated water harvesting efficiency by comparing patterned surfaces with uniformly coated superhydrophobic and superhydrophilic surfaces.

Main Results:

• Patterned wettability surfaces demonstrated significant water harvesting efficiency.
• Maximum water harvesting efficiency reached approximately 5.3 g cm⁻² h⁻¹.
• The size and density of superhydrophilic regions influenced droplet condensation, coalescence, and overall efficiency.

Conclusions:

• Biomimetic patterned surfaces offer a promising strategy for efficient fog water harvesting.
• This approach can contribute to alleviating water crises in arid regions.
• Further optimization of surface patterns can enhance water collection capabilities.