Electrical and gas sensing properties of ZnO nanorod arrays directly grown on a four-probe electrode system

Q. Ahsanulhaq, J. H. Kim, J. S. Lee, Y. B. Hahn

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

A method for measuring the electrical characteristics of aligned ZnO nanorod arrays (NRAs) directly grown on a pre-patterned four-point probe system in solution was proposed. This four-probe method enabled us to perform electrical measurements directly on the as-grown ZnO nanorod arrays without any additional processing. The location, shape and length of the rods directly grown on the four-probe electrodes were well controlled. The current-voltage characteristics showed a low turn-on voltage and a high saturation current. These ZnO NRAs devices were implemented as gas sensors for detecting hydrogen. The sensitivity increased with the concentration of H2 and the operating temperature.

Original languageBritish English
Pages (from-to)475-478
Number of pages4
JournalElectrochemistry Communications
Volume12
Issue number3
DOIs
StatePublished - Mar 2010

Keywords

  • Electrical and gas sensing properties
  • Four-probe electrode
  • Solution method
  • ZnO nanorod arrays

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