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Related Experiment Video

Updated: May 5, 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

Insights into graphene functionalization by single atom doping.

Amir Natan¹, Mark C Hersam, Tamar Seideman

¹Department of Physical Electronics, Tel-Aviv University, Tel-Aviv, 69978, Israel. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.

|November 29, 2013

Summary

This summary is machine-generated.

Chemical modification of graphene, like fluorine adsorption, alters its electronic properties. A new model explains Fermi level shifts with coverage, applicable to nitrogen substitution too.

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Area of Science:

Materials Science
Condensed Matter Physics
Computational Chemistry

Background:

Chemical modification of graphene is crucial for tuning its electronic properties.
Graphene-based electronic devices require precise control over electronic characteristics.

Purpose of the Study:

To investigate the impact of fluorine adsorption on graphene's electronic structure.
To develop a general model for Fermi level shifts due to chemical modification.
To validate the model with nitrogen substitution in graphene.

Main Methods:

Density Functional Theory (DFT) based calculations.
Analysis of electronic structure, band gap, and Fermi level shifts.
Modeling of charge transfer patterns.

Main Results:

Fluorine adsorption significantly affects graphene's electronic structure.
A simple, general model accurately predicts Fermi level shifts with fluorine coverage.
The model successfully explains Fermi level shifts in nitrogen-substituted graphene.
Charge transfer patterns correlate with the proposed Fermi level shift model.

Conclusions:

Chemical adsorption, specifically fluorine, offers a viable route to engineer graphene's electronic properties.
The developed model provides a predictive tool for Fermi level modulation in modified graphene systems.
This work contributes to the rational design of advanced graphene-based electronic devices.