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.

• Keywords
• acetone, gas sensors, heterojunctions, metal oxides, volatile organic compounds (VOCs),
• MeSH
• Acetone metabolism   MeSH
• Cerium chemistry   MeSH
• Nanowires chemistry   MeSH
• Oxides chemistry   MeSH
• Volatile Organic Compounds metabolism   MeSH
• Tungsten chemistry   MeSH
• Publication type
• Journal Article MeSH
• Names of Substances
• Acetone MeSH
• Cerium MeSH
• ceric oxide MeSH Browser
• Oxides MeSH
• Volatile Organic Compounds MeSH
• tungsten oxide MeSH Browser
• Tungsten MeSH