A Review of Carbon Nanotubes-Based Gas Sensors

By Yun Wang, John Tze-Wei Yeow. J. Sensors, 2009

532 citations recorded by the source corpus.

Gas sensors have attracted intensive research interest due to the demand of sensitive, fast response, and stable sensors for industry, environmental monitoring, biomedicine, and so forth. The development of nanotechnology has created huge potential to build highly sensitive, low cost, portable sensors with low power consumption. The extremely high surface-to-volume ratio and hollow structure of nanomaterials is ideal for the adsorption of gas molecules. Particularly, the advent of carbon nanotubes (CNTs) has fuelled the inventions of gas sensors that exploit CNTs' unique geometry, morphology, and material properties. Upon exposure to certain gases, the changes in CNTs' properties can be detected by various methods. Therefore, CNTs-based gas sensors and their mechanisms have been widely studied recently. In this paper, a broad but yet in-depth survey of current CNTs-based gas sensing technology is presented. Both experimental works and theoretical simulations are reviewed. The design, fabrication, and the sensing mechanisms of the CNTs-based gas sensors are discussed. The challenges and perspectives of the research are also addressed in this review.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/2dd182d287b5b1e8ea6a747f1f61e0f1495a24f6

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Citations in the corpus

Carbon nanotubes: synthesis, properties and engineering applications (2019, background): “Some CNT array sensors are also reviewed recently [152].”
An Overview of the Recent Progress in the Synthesis and Applications of Carbon Nanotubes (2019, background): “As a result, theoretical evaluations of gas adsorption and gas-sensing systems based on CNTs have been the topics of extensive research [202,208].”
Semiconductor Gas Sensors: Materials, Technology, Design, and Application (2020, background): “Their synthesis is costly and still challenging as it is difficult to grow continuously defect free nanotubes [28].”