Recent progress on the development of bioinspired surfaces with high aspect ratio microarray structures: From...

Area of Science:

• Materials Science
• Surface Science
• Biomimetics

Background:

• High aspect ratio microarray structures are inspired by natural systems like lotus leaves.
• These surfaces can be engineered for sophisticated tasks in microfluidics, sensors, and biomedicine.
• External stimuli (optical, electric, thermal, magnetic) induce changes in surface properties.

Purpose of the Study:

• To review fabrication principles of high aspect ratio microarray structures.
• To clarify mechanisms of liquid manipulation on these dynamic surfaces.
• To discuss intelligent control strategies and applications.

Main Methods:

• Classification and summarization of fabrication principles.
• Analysis of liquid manipulation mechanisms (Wenzel, Cassie models, Laplace pressure).
• Demonstration of intelligent control strategies.

Main Results:

• Surfaces exhibit hydrophilic/hydrophobic switching and shape changes upon stimulation.
• Effective manipulation of liquid/air transport demonstrated.
• Successful applications in microfluidics, drug delivery, and patch sensors highlighted.

Conclusions:

• Biomimetic surfaces with high aspect ratio microarrays offer dynamic control over liquid/air.
• These surfaces hold significant potential for advanced microfluidic and biomedical applications.
• Future research should focus on further challenges and insights for dynamic manipulation.