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Inverse opal nanoassemblies : novel architectures for gas sensors the SnO2:Zn case

Sutti, Alessandra, Calestani, Gianluca, Dionigi, Chiara, Baratto, Camilla, Ferroni, Matteo, Faglia, Guido and Sberveglieri, Giorgio 2006, Inverse opal nanoassemblies : novel architectures for gas sensors the SnO2:Zn case, in Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical Applications, Materials Research Society, Warrendale, Penn, pp. 257-263.

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Title Inverse opal nanoassemblies : novel architectures for gas sensors the SnO2:Zn case
Author(s) Sutti, Alessandra
Calestani, Gianluca
Dionigi, Chiara
Baratto, Camilla
Ferroni, Matteo
Faglia, Guido
Sberveglieri, Giorgio
Conference name Materials Research Society. Symposia (2006 : San Francisco, Calif.)
Conference location San Francisco, California
Conference dates April 18-20, 2006
Title of proceedings Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical Applications
Editor(s) Comini, Elisabetta
Publication date 2006
Series Materials Research Society symposia proceedings ; v. 915.
Conference series Materials Research Society Symposia
Start page 257
End page 263
Publisher Materials Research Society
Place of publication Warrendale, Penn
Summary A novel technique is here presented, based on inverse opal metal oxide structures for the production of high quality macro and meso-porous structures for gas sensing. Taking advantage of a sol-gel templated approach. different mixed semiconducting oxides with high surface area, commonly used in chemical sensing application, were synthesized. In this work we report the
comparison between SnO2 and SnO2:Zn. As witnessed by Scanning and Transmission Electron Microscopy (SEM and TEM) analyses and by Powder x-ray Diffraction (PX RD), highly ordered meso-porous structures were formed with oxide crystalline size never exceeding 20 nm . The filled templates. in form of thick films, were bound to allumina substrate with Pt interdigitated contacts
and Pt heater, through in situ calcination, in order to perform standard electrical characterization. Pollutant gases like CO and NO2 and methanol. as interfering gas, were used for the targeted electrical gas tests. All samples showed low detection limits towards both reducing and oxidizing species in low temperature measurements. Moreover, the addition of high molar percentages of Zn( II) affected the beha viour of electrical response improv ing the se lecti vity of the proposed system.
ISBN 9781558998711
1558998713
ISSN 0272-9172
Language eng
Field of Research 100708 Nanomaterials
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category E1.1 Full written paper - refereed
Persistent URL http://hdl.handle.net/10536/DRO/DU:30022397

Document type: Conference Paper
Collection: Centre for Material and Fibre Innovation
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