Guido Faglia

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Synthesis--particularly by electrochemical anodization-, growth mechanism and chemical sensing properties of pure, doped and mixed titania tubular arrays are reviewed. The first part deals on how anodization parameters affect the size, shape and morphology of titania nanotubes. In the second part fabrication of sensing devices based on titania nanotubes is(More)
The research and development of solid state gas sensors with low cost and reduced size for the monitoring of the gaseous species is rapidly increasing in the last years [1]. Many technological approaches have been proposed regarding the different materials and the detecting principles. The currently available sensors use several transduction principles:(More)
The present work reports on conductometric gas sensors based on metal oxide nanostructures developed in our laboratory in Brescia (Italy) showing their potentialities in term of sensitivity, selectivity and stability toward different molecules, including odorous compounds such as ammonia and hydrogen sulfide. The capability of these devices to discriminate(More)
A planar ThermoElectric Generator (TEG) containing five thermocouples based on nanostructured metal-oxide elements wired electrically in series and thermally in parallel has been designed and fabricated. The thermoelectric elements consist of ZnO (n-type) and CuO (p-type) bundles of quasi-monodimensional nanowires deposited utilizing shadow masks. The TEG(More)
Atomic force and high resolution scanning tunneling analyses were carried out on nanostructured WO 3 films. It turned out that the band gap measured by scanning tunneling spectroscopy at surface is lower than the band gap reported in the literature. This effect is attributed to the high density of surface states in this material, which allows tunneling into(More)
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