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Your search keyword '"SBERVEGLIERI G."' showing total 24 results
Start Over Author "SBERVEGLIERI G." Publication Type Books
24 results on '"SBERVEGLIERI G."'

6. Optical Gas Sensing Properties of ZnO Nanowires

Author

Todros, S., primary, Baratto, C., additional, Comini, E., additional, Faglia, G., additional, Ferroni, M., additional, Sberveglieri, G., additional, Lettieri, S., additional, Setaro, A., additional, Santamaria, L., additional, and Maddalena, P., additional

Published
2009
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11. A Smart Sensor System for Carbon Monoxide Detection

Author

Cardinali, G. C., primary, Dori, L., additional, Fiorini, M., additional, Sayago, I., additional, Faglia, G., additional, Perego, C., additional, Sberveglieri, G., additional, Liberali, V., additional, Maloberti, F., additional, and Tonietto, D., additional

Published
1997
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22. Optical Gas Sensing Properties of ZnO Nanowires.

Author

Todros, S., Baratto, C., Comini, E., Faglia, G., Ferroni, M., Sberveglieri, G., Lettieri, S., Setaro, A., Santamaria, L., and Maddalena, P.

Abstract

New breakthroughs in preparation technology have given further impulse for developing chemical sensing devices based on nanostructured ZnO. Due to their peculiar characteristics and size effects, these materials often show novel physical properties. In this work, we studied the optical properties of ZnO nanowires, synthesized via evaporation-condensation (EC) process, by room temperature photoluminescence (PL) and Time Resolved PL analysis. ZnO PL spectrum shows an UV peak, attributed to free exciton, and a broad visible band, strongly depending on the preparation conditions in the range from green to yellow. UV photoluminescence of ZnO nanowires was studied in gaseous atmosphere, targeting mainly NO2 sensing applications. Continuous wave PL shows that a reversible modification is obtained upon exposure to low concentration of NO2. The effect of interfering species like ethanol and RH% has also been studied. Time-resolved PL shows small modifications of recombination rates due to introduction of NO2 not proportional to simultaneous changes in PL intensity. This behaviour supports the idea that NO2 molecules, chemisorbed on the ZnO surface, lead to suppression of radiative states. [ABSTRACT FROM AUTHOR]

Published
2010
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23. RESISTANCE HEATING.

Author

Hellmich, W. and Sberveglieri, G.

Subjects
HEATING, ELECTRIC resistance, ELECTRICAL engineering, TECHNICAL specifications, TECHNOLOGY, ELECTRONICS, HOT surface igniters
Abstract

This article presents information on devices which involve resistance heating. Resistance heating generally is an unwanted side-effect in electrical engineering. A lot of effort is put into transforming energy as effectively as possible. Resistive losses cost energy, of course. Resistive heating has the advantage of being compatible with electronics. Therefore, the heating power can be controlled easily and rapidly. The purpose of igniters is to transform a small amount of electrical energy into heat to start an exothermic chemical reaction causing an explosion. Flow sensors or anemometers may consist of one or more resistors. The simplest anemometer consists of a sole temperature- dependent resistor.

Published
1999

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