Cerium oxide-tungsten oxide core-shell nanowire-based microsensors sensitive to acetone

Milena Tomić, Milena Šetka, Ondřej Chmela, Isabel Gràcia, Eduard Figueras, Carles Cané, Stella Vallejos

Research output: Contribution to journalArticleResearch

4 Citations (Scopus)

Abstract

© 2018 by the authors. Gas sensitive cerium oxide-tungsten oxide core-shell nanowires are synthesized and integrated directly into micromachined platforms via aerosol assisted chemical vapor deposition. Tests to various volatile organic compounds (acetone, ethanol, and toluene) involved in early disease diagnosis demonstrate enhanced sensitivity to acetone for the core-shell structures in contrast to the non-modified materials (i.e., only tungsten oxide or cerium oxide). This is attributed to the high density of oxygen vacancy defects at the shell, as well as the formation of heterojunctions at the core-shell interface, which provide the modified nanowires with ‘extra’ chemical and electronic sensitization as compared to the non-modified materials.
Original languageEnglish
Article number116
JournalBiosensors
Volume8
DOIs
Publication statusPublished - 23 Nov 2018

Keywords

  • Acetone
  • Gas sensors
  • Heterojunctions
  • Metal oxides
  • Volatile organic compounds (VOCs)

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