Bias modulated highly sensitive NO2 gas detection using carbon nanotubes

Jong Hong Lee, Joondong Kim, Hee Won Seo, Jin Won Song, Eung Sug Lee, Mooncheol Won, Chang-Soo Han

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A NO2 gas sensor of carbon nanotubes (CNT) array was fabricated by a dielectrophoretic method. It is the first report of 50 ppb level detection operating at room temperature without a supplementary assistance of a heating system, vacuum environment, metal decoration, or additional film coating. The as-deposited CNTs on Pt electrodes by dropping of a CNT cropped solution provided good contact formation without post contact treatment. The bias voltage modulation improved the sensor performance by controlling the Schottky barrier potential. It is highly sensitive NO2 detection at room temperature, which may benefit to reduce the fabrication steps and cost as well.

Original languageEnglish
Pages (from-to)628-631
Number of pages4
JournalSensors and Actuators, B: Chemical
Volume129
Issue number2
DOIs
Publication statusPublished - 2008 Feb 22
Externally publishedYes

Fingerprint

Carbon Nanotubes
Contacts (fluid mechanics)
Carbon nanotubes
Gases
carbon nanotubes
Bias voltage
Chemical sensors
gases
Metals
sensors
vacuum systems
Modulation
Vacuum
room temperature
Heating
Fabrication
Coatings
Temperature
Electrodes
Sensors

Keywords

  • 50 ppb NO detection
  • Carbon nanotube
  • Dielectrophoretic
  • Room temperature
  • Schottky barrier

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

Bias modulated highly sensitive NO2 gas detection using carbon nanotubes. / Lee, Jong Hong; Kim, Joondong; Seo, Hee Won; Song, Jin Won; Lee, Eung Sug; Won, Mooncheol; Han, Chang-Soo.

In: Sensors and Actuators, B: Chemical, Vol. 129, No. 2, 22.02.2008, p. 628-631.

Research output: Contribution to journalArticle

Lee, Jong Hong ; Kim, Joondong ; Seo, Hee Won ; Song, Jin Won ; Lee, Eung Sug ; Won, Mooncheol ; Han, Chang-Soo. / Bias modulated highly sensitive NO2 gas detection using carbon nanotubes. In: Sensors and Actuators, B: Chemical. 2008 ; Vol. 129, No. 2. pp. 628-631.
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