What is it about?

Metallic nanostructures have been used to improve sensor responses in identifying and quantifying viruses, bacteria, and illicit drugs. To build them, electrical forces are needed. Moreover, we have discovered a passive force that helps in their construction.

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Why is it important?

Microelectrode's shape induce the passive force that improves the transportation of nanoparticles. Therefore, through a thoughtful initial design of the microsystem we can promote a better construction of metallic nanostructures, i.e., better sensors.


While we've seen some basic sensor designs with straight, round, or triangular channels, there's a world of potential for enhancing sensor performance by embracing more intricate and sophisticated designs. These innovations can significantly boost the sensor's ability to accurately identify various illicit drugs and viruses.

Carlos Vargas
Universidad Nacional Autonoma de Mexico

Read the Original

This page is a summary of: Colloid transport by an oscillatory electroosmotic flow between microelectrodes of axially variable shape, Physics of Fluids, September 2023, American Institute of Physics,
DOI: 10.1063/5.0165213.
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