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Updated: May 31, 2026

Identification of Novel Regulators of Plant Transpiration by Large-Scale Thermal Imaging Screening in Helianthus Annuus
Published on: January 30, 2020
A bio-inspired micropump based on stomatal transpiration in plants
Jing-min Li1, Chong Liu, Zheng Xu
1Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, 116023, PR China.
Researchers developed a bio-inspired micropump mimicking plant stomatal transpiration. This device offers controllable, high flow rates without external power, enabling efficient fluid transport.
Area of Science:
- Biomimetic engineering
- Fluid dynamics
- Materials science
Background:
- Stomatal transpiration in plants efficiently transports water via micropores.
- The "diameter-law" describes how micropore flow rates exceed macroscale evaporation.
- Controlling stomatal aperture regulates water flow.
Purpose of the Study:
- To present a novel bio-inspired micropump based on the principles of stomatal transpiration.
- To demonstrate controllable and efficient fluid transport using a biomimetic device.
Main Methods:
- Fabrication of a three-layer micropump using PVC film with slit-like micropores, a PMMA sheet, and a microporous membrane.
- Utilizing stomatal transpiration principles for fluid propulsion.
- Characterization of flow rates under varying conditions.
Main Results:
- Achieved controllable flow rates ranging from 0.13 to 3.74 μl min⁻¹.
- Demonstrated high and adjustable flow-rate capabilities.
- The micropump operates without external power sources or equipment.
Conclusions:
- The developed bio-inspired micropump offers a simple, low-cost solution for fluid-driven applications.
- Its "plug and play" nature and adjustable flow rates make it versatile.
- Mimicking plant transpiration provides an efficient model for microfluidic devices.
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