P2.4.21 Detection of Flammable and Toxic Analytes by Urchin-like ZnO Nanomaterials
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P2.4 Nanostructured Sensors
- D. Bekermann, A. Gasparotto, C. Maccato - Department of Chemistry, Padova University and INSTM (Italy), D. Barreca - CNR-ISTM and INSTM, Department of Chemistry, Padova University (Italy), E. Comini, G. Sberveglieri - CNR-IDASC, SENSOR Lab, Department of Chemistry and Physics (Italy), C. Sada - Department of Physics and CNISM, Padova University (Italy), A. Devi, R. Fischer - Lehrstuhl für Anorganische Chemie II, Ruhr-University Bochum (Germany)
- 1563 - 1566
This contribution focuses on ZnO-based gas sensors with outstanding performances in the detection of flammable and toxic analytes, including acetone, ethanol, hydrogen, nitrogen dioxide, ozone and carbon monoxide. In particular, ZnO nanorods (NRs) were grown by Plasma-Assisted Chemical Vapor Deposition (PA-CVD) on polycrystalline Al2O3 slides at 200-300°C. The system characterization by Glancing incidence X-ray diffraction (GIXRD) and Field Emission Scanning Electron Microscopy (FE-SEM) evidenced the formation of <001> oriented NR arrays with a unique urchin-like morphology. The obtained nanosystems were tested as solid state gas sensors, providing very high responses, a significant reversibility and appreciably low detection limits.