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Inverse opal nanoassemblies : novel architectures for gas sensors the SnO2:Zn case
conference contribution
posted on 2006-01-01, 00:00 authored by Alessandra SuttiAlessandra Sutti, G Calestani, C Dionigi, C Baratto, M Ferroni, G Faglia, G SberveglieriA 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.
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.
History
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Materials Research Society. Symposia (2006 : San Francisco, Calif.)Series
Materials Research Society symposia proceedings ; v. 915.Pagination
257 - 263Publisher
Materials Research SocietyLocation
San Francisco, CaliforniaPlace of publication
Warrendale, PennStart date
2006-04-18End date
2006-04-20ISSN
0272-9172ISBN-13
9781558998711ISBN-10
1558998713Language
engPublication classification
E1.1 Full written paper - refereedEditor/Contributor(s)
E CominiTitle of proceedings
Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical ApplicationsUsage metrics
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