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Related Experiment Video

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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

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Published on: September 8, 2023

Experimental percolation studies of random networks.

A Feinerman¹, J Weddell²

¹Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, USA.

The Review of Scientific Instruments

|July 3, 2017

Summary

Researchers developed a high-resolution method to study electrical networks by cutting elliptical pores into conductive sheets. This experiment reveals how pore shape influences the percolation threshold, a key factor in material conductivity.

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Published on: December 4, 2020

Area of Science:

Materials Science
Electrical Engineering
Physics

Background:

Understanding electrical percolation in materials is crucial for designing conductive networks.
Previous methods lacked the resolution to precisely study the impact of pore geometry on conductivity.

Purpose of the Study:

To establish a high-resolution experimental method for studying electrically percolating networks.
To investigate the relationship between pore geometry, specifically ellipse aspect ratio, and the percolation threshold.

Main Methods:

Utilized a CO2 laser system for precise cutting of elliptical pores into a conductive sheet.
Measured current as a function of time while applying a voltage across the sheet.
Varied the aspect ratio of elliptical pores to observe changes in electrical current flow.

Main Results:

Demonstrated a method for higher-resolution study of electrical percolation.
Showed that the percolation threshold approaches one as the ellipse aspect ratio approaches zero.
Confirmed experimental verification of percolation threshold dependence on pore geometry.

Conclusions:

The developed laser-based method allows for detailed experimental analysis of percolation phenomena.
Pore geometry significantly impacts the percolation threshold in conductive materials.
This technique can be applied to study the effects of removing small or complex-shaped pores.