A group of Concordia researchers has developed the primary micromotors able to transferring via the air utilizing solely mild as their energy supply. These tiny, pollen-shaped particles measure about 12 microns large—roughly one-tenth the thickness of a human hair. Product of zinc oxide and coated with gold, they use warmth from near-infrared mild to raise and propel themselves with none gasoline or batteries.
When a beam of sunshine strikes the micromotors, the gold absorbs power and heats the encompassing air. This warmth creates mild convection currents—like rising heat air—that push the particles upward and permit them to maneuver in managed instructions. By adjusting the place of the sunshine, the researchers can steer their movement.
Till now, micromotors might solely transfer in liquid environments, the place buoyancy helps their movement. Attaining managed motion in air is much harder due to gravity and the shortage of a surrounding fluid. This breakthrough might result in airborne purposes corresponding to microscopic sensors that detect pollution or particles designed to assist clear the air.
The examine is printed within the journal Superior Supplies.
Extra data:
Pedro Mena‐Giraldo et al, Mild‐Activated Micromotors in Air Propelled by Thermal Convection, Superior Supplies (2025). DOI: 10.1002/adma.202505959
Offered by
Concordia College
Quotation:
Mild-powered micromotors can transfer via air (2025, November 13)
retrieved 13 November 2025
from https://phys.org/information/2025-11-powered-micromotors-air.html
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