Rapid determination of volatile organics using a nanoporous zinc oxide microsphere-coated quartz crystal microbalance

Chih Chia Wang, Pei Ying Lin, Chia Jung Lu, Mao Huang Liu

Research output: Contribution to journalArticle

3 Citations (Scopus)


The organic vapor sensing properties of nanoporous ZnO microspheres coated on a quartz crystal microbalance were characterized. The ZnO nanoparticles were aggregated by aqueous synthesis into micrometer diameter spheres. The porous structure of the microspheres provided sufficient surface area for vapor adsorption and diffusion for gas exchange. The reversible response suggests that complete desorption without contamination was achieved. Sensing films on a quartz crystal microbalance (QCM) were characterized using five volatile organic compounds with different functional groups to compare the differences in selectivity between polyisobutylene (PIB) and nanoporous ZnO. The response time for nanoporous ZnO was half the value of the PIB-coated sensor. The results show that nanoporous ZnO microspheres are an alternative that provide selectivity and rapid response for QCM.

Original languageEnglish
Pages (from-to)639-649
Number of pages11
JournalInstrumentation Science and Technology
Issue number6
Publication statusPublished - 2017 Nov 2



  • Polyisobutylene
  • quartz crystal microbalance
  • scanning electron microscopy
  • volatile organic compounds
  • zinc oxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Instrumentation
  • Environmental Science(all)

Cite this