Advances in NO2 sensing with individual single-walled carbon nanotube transistors
Open access
Date
2014-11-20Type
- Journal Article
ETH Bibliography
yes
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Abstract
The charge carrier transport in carbon nanotubes is highly sensitive to certain molecules attached to their surface. This property has generated interest for their application in sensing gases, chemicals and biomolecules. With over a decade of research, a clearer picture of the interactions between the carbon nanotube and its surroundings has been achieved. In this review, we intend to summarize the current knowledge on this topic, focusing not only on the effect of adsorbates but also the effect of dielectric charge traps on the electrical transport in single-walled carbon nanotube transistors that are to be used in sensing applications. Recently, contact-passivated, open-channel individual single-walled carbon nanotube field-effect transistors have been shown to be operational at room temperature with ultra-low power consumption. Sensor recovery within minutes through UV illumination or self-heating has been shown. Improvements in fabrication processes aimed at reducing the impact of charge traps have reduced the hysteresis, drift and low-frequency noise in carbon nanotube transistors. While open challenges such as large-scale fabrication, selectivity tuning and noise reduction still remain, these results demonstrate considerable progress in transforming the promise of carbon nanotube properties into functional ultra-low power, highly sensitive gas sensors. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000094904Publication status
publishedExternal links
Journal / series
Beilstein Journal of NanotechnologyVolume
Pages / Article No.
Publisher
Beilstein-Institut zur Förderung der Chemischen WissenschaftenSubject
Carbon nanotube field-effect transistors (CNFETs); Cross-sensitivity; Functionalization; Gas sensors; Hysteresis; Low power; Selectivity; Self-heating; Single walled carbon nanotubesOrganisational unit
03609 - Hierold, Christofer / Hierold, Christofer
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ETH Bibliography
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