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The Electrical Double Layer

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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...

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Related Experiment Video

Updated: May 14, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

Strain induced chemical potential difference between monolayer graphene sheets.

Yupeng Zhang¹, Chengzhi Luo, Weiping Li

¹School of Physics and Technology, MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China.

|February 22, 2013

Summary

Stretching monolayer graphene on a flexible substrate generates electricity. This study demonstrates tuning graphene

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Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

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Published on: July 24, 2015

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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

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Published on: January 21, 2016

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Graphene exhibits unique electronic properties.
Flexible electronics require novel energy harvesting methods.

Purpose of the Study:

To investigate electricity generation in strained graphene.
To explore methods for tuning graphene's band gap.

Main Methods:

Depositing monolayer graphene on polydimethylsiloxane (PDMS) substrates.
Applying tensile strain to the substrate.
Measuring electric potential differences.
Performing theoretical band structure calculations.

Main Results:

An 8 mV potential difference was observed at 5% strain.
Theoretical analysis confirmed tunable band gaps in graphene.
Demonstrated a method for inducing electricity generation.

Conclusions:

Tensile strain can induce electricity in monolayer graphene.
Band gap engineering offers a route to graphene-based power generation.
Potential applications in flexible electronic devices.