Selective real-time nitric oxide detection by functionalized zinc oxide

Chien Cheng Liu, Jan Hao Li, Cheng Chung Chang, Yu Chiang Chao, Hsin Fei Meng, Sheng Fu Horng, Cheng Hsiung Hung, Tzu Ching Meng

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Ferriprotoporphyrin IX chloride (haemin)-functionalized Al-doped zinc oxide (ZnO) is used for nitric oxide (NO) sensing at room temperature. The devices show high selectivity to NO against CO2 and O2. There is no such selectivity without haemin. Porous ZnO film made by a polystyrene sphere template is used to provide a high surface area. In comparison with non-porous ZnO film with low surface area, both the sensitivity and the response speed of the sensor made by porous ZnO are clearly improved. NO concentration down to 1 ppm can be detected. The response time is 20 s. The sensor is reversible after purging with pure nitrogen for about 100 s. Such a device is able to detect real-time variation of NO which is a vital physiological signalling molecule.

Original languageEnglish
Article number155105
JournalJournal of Physics D: Applied Physics
Volume42
Issue number15
DOIs
Publication statusPublished - 2009 Sep 17

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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