Enhancement of CuO and ZnO nanowires methanol sensing properties with diode-based structure

Teck Yaw Tiong, Chang Fu Dee, Azrul Azlan Hamzah, Burhanuddin Yeop Majlis, Saadah Abdul Rahman

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Metal oxides nanostructures are important materials involving in the development of gas detection systems, but most of them only working at elevated temperature. A diode based structure of p-type copper oxide (CuO) and n-type zinc oxide (ZnO) nanowires (NWs) on silicon, which posses rectifying I-V characteristic, was fabricated to overcome this drawback. Gas sensing characteristics of CuO NWs and ZnO NWs with and without diode structure have been examined by measuring the resistance change towards 0.5% methanol vapour at room temperature. The diode based structures showed significant improvement in sensing behaviours. The implementation of CuO NWs and ZnO NWs with diode based structures showed great enhancement in terms of sensitivity, reliability and recovery rate. The findings can contribute to the development of room temperature gas sensing system. The fabrication procedures and working principles of the diode structures are detailed in this paper.

Original languageEnglish
Pages (from-to)1322-1332
Number of pages11
JournalSensors and Actuators, B: Chemical
Volume202
DOIs
Publication statusPublished - 31 Oct 2014

Fingerprint

Zinc Oxide
Zinc oxide
zinc oxides
Nanowires
Methanol
Diodes
nanowires
methyl alcohol
diodes
augmentation
Gases
gases
Copper oxides
copper oxides
room temperature
Silicon
Temperature
Oxides
metal oxides
Nanostructures

Keywords

  • CuO
  • Diode based nanostructures
  • Methanol
  • Nanowires
  • Room temperature working gas sensor
  • ZnO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Materials Chemistry
  • Instrumentation

Cite this

Enhancement of CuO and ZnO nanowires methanol sensing properties with diode-based structure. / Tiong, Teck Yaw; Dee, Chang Fu; Hamzah, Azrul Azlan; Yeop Majlis, Burhanuddin; Abdul Rahman, Saadah.

In: Sensors and Actuators, B: Chemical, Vol. 202, 31.10.2014, p. 1322-1332.

Research output: Contribution to journalArticle

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