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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

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Mobility gap and quantum transport in a functionalized graphene bilayer.

Ahmed Missaoui¹, Jouda Jemaa Khabthani², Nejm-Eddine Jaidane¹

¹Laboratoire de Spectroscopie Atomique Moléculaire et Applications, Département de Physique, Faculté des Sciences de Tunis, Université de Tunis El Manar, Campus Universitaire 1060 Tunis, Tunisia.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|March 28, 2018

Summary

Selective functionalization of Bernal graphene bilayers creates a mobility gap near the Dirac energy. This research highlights how sublattice-specific adatom functionalization impacts electronic properties in bilayer graphene.

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Area of Science:

Condensed Matter Physics
Materials Science
Nanotechnology

Background:

Bernal graphene bilayers possess two inequivalent sublattices, A and B.
Functionalization of graphene can alter its electronic properties.

Purpose of the Study:

To analyze the density of states and conductivity of Bernal graphene bilayers with selective sublattice functionalization.
To investigate the impact of adatom concentration on electronic properties.

Main Methods:

Theoretical analysis of density of states.
Calculation of conductivity in functionalized graphene bilayers.
Modeling of random functionalization on specific sublattices (A or B).

Main Results:

Selective functionalization on sublattice B induces a mobility gap of approximately 0.5 eV near the Dirac energy.
Anomalous conductivity behaviors are observed at other energy levels.
The observed phenomena are linked to the inherent bipartite structure of graphene.

Conclusions:

Sublattice-selective functionalization is a viable method to engineer electronic band structures in Bernal graphene bilayers.
The bipartite nature of graphene plays a crucial role in its electronic response to functionalization.
This study offers insights into controlling the electronic properties of 2D materials for potential applications.