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Updated: Jul 20, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
BTEX sensing potential of elemental-doped graphene: a DFT study
Hongping Zhang1, Run Zhang2, Shuchun Hu3
1School of Mechanical Engineering, Institute for Advanced Study, Chengdu University, Sichuan 610041, China. zhanghongping@cdu.edu.cn.
Elementally-doped graphene shows promise for gas sensing. N-, O-, and Pd-doped graphenes are effective for detecting benzene, toluene, ethylbenzene, and xylene (BTEX), with O- and Pd-doping excelling in ethylbenzene selectivity.
Area of Science:
- Materials Science
- Nanotechnology
- Computational Chemistry
Background:
- Graphene, a 2D material, is a novel platform for gas sensors.
- Elemental doping enhances graphene's gas sensing properties.
- Detecting volatile organic compounds like BTEX is crucial for environmental and safety monitoring.
Purpose of the Study:
- To investigate the effect of elemental doping on graphene's sensing performance for BTEX compounds.
- To identify optimal dopants and doping strategies for enhanced BTEX gas sensing.
- To analyze the electronic structure and sensitivity of doped graphene towards BTEX molecules.
Main Methods:
- Density Functional Theory (DFT) calculations were employed.
- Systematic analysis of electronic structures and gas molecule interactions.
- Evaluation of sensitivity and selectivity for 22 different elemental doped graphenes.
Main Results:
- Doping method and dopant type significantly impact graphene-BTEX interactions.
- N-, O-, and Pd-doped graphenes show potential for BTEX sensing.
- N-doped graphene offers high sensitivity to toluene, ethylbenzene, and xylene, but low sensitivity to benzene.
- O- and Pd-doped graphenes exhibit excellent selectivity for ethylbenzene, with Pd-doping showing higher sensitivity.
Conclusions:
- Elemental doping is a viable strategy to tune graphene's gas sensing capabilities.
- N-, O-, and Pd-doped graphenes are promising candidates for BTEX detection.
- Specific dopants offer distinct advantages in sensitivity and selectivity for targeted BTEX compounds, paving the way for advanced gas sensing technologies.
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