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

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Functionalized Graphene Surfaces for Selective Gas Sensing.

Natalia Alzate-Carvajal¹, Adina Luican-Mayer¹

¹Department of Physics, University of Ottawa, Ottawa, Ontario K1N 9A7, Canada.

|September 9, 2020

Summary

Graphene gas sensors show promise for environmental monitoring. Chemical functionalization with aromatic molecules and polymers is emerging as a key strategy to enhance selectivity and overall performance for specific gas detection.

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Area of Science:

Materials Science
Chemical Engineering
Environmental Science

Background:

Environmental monitoring relies heavily on gas sensors for industrial safety and ecological protection.
Graphene offers excellent properties for next-generation gas sensing, including high surface area, conductivity, and mechanical strength.
Current graphene gas sensors achieve high sensitivity but struggle with selectivity for specific gases.

Purpose of the Study:

To review recent advancements in graphene and reduced graphene oxide gas sensors.
To explore surface functionalization strategies for improving gas sensor selectivity.
To highlight the use of aromatic molecules and polymers for enhanced gas detection.

Main Methods:

Review of literature on graphene and reduced graphene oxide gas sensor fabrication.
Analysis of chemical functionalization techniques using aromatic molecules and polymers.
Characterization methods for evaluating sensor performance, focusing on selectivity.

Main Results:

Surface functionalization significantly enhances selectivity in graphene-based gas sensors.
Aromatic molecules and polymers are effective in tailoring sensor response to specific gases.
Functionalized graphene sensors demonstrate improved overall performance beyond sensitivity.

Conclusions:

Chemical functionalization is a critical approach to overcome selectivity challenges in graphene gas sensors.
Tailored functionalization enables the development of high-performance sensors for targeted environmental monitoring.
This review provides insights into the potential of functionalized graphene for advanced gas sensing applications.