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

AuthorsTomić, Milena; Šetka, Milena; Chmela, Ondřej; Gràcia Tortadès, Isabel; Figueras Costa, Eduard; Cané Ballart, Carles; Vallejos, Stella
KeywordsGas sensors
Volatile organic compounds (VOCs)
Metal oxides
Issue Date23-Nov-2018
PublisherMultidisciplinary Digital Publishing Institute
CitationBiosensors 8(4): 116 (2018)
AbstractGas 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.
Publisher version (URL)https://doi.org/10.3390/bios8040116
Appears in Collections:(IMB-CNM) Artículos
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