P2.4.21 Detection of Flammable and Toxic Analytes by Urchin-like ZnO Nanomaterials

Event

14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany

Chapter

P2.4 Nanostructured Sensors

Author(s)

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)

Pages

1563 - 1566

DOI

10.5162/IMCS2012/P2.4.21

ISBN

978-3-9813484-2-2

Price

free

Abstract

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.