http://www.cnr.it/ontology/cnr/individuo/prodotto/ID35541

Electrical responses of silica mesostructured films to changes in environmental humidity and processing conditions (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Electrical responses of silica mesostructured films to changes in environmental humidity and processing conditions (Articolo in rivista) (literal)

Anno

2005-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.jnoncrysol.2005.05.015 (literal)

Alternative label

Innocenzi P., Falcaro P., Bertolo J.M., Bearzotti A., Amenitsch H. (2005)
Electrical responses of silica mesostructured films to changes in environmental humidity and processing conditions
in Journal of non-crystalline solids; Academic Press Elsevier, Amsterdam (Paesi Bassi)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Innocenzi P., Falcaro P., Bertolo J.M., Bearzotti A., Amenitsch H. (literal)

Pagina inizio

1980 (literal)

Pagina fine

1986 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://www.sciencedirect.com/science/article/pii/S0022309305003698 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

351 (literal)

Rivista

Journal of non-crystalline solids (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

24-26 (literal)

Note

Scopu (literal)
ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Univ Sassari, Nanoworld Inst, Dipartimento Architettura & Pianificaz, Lab Sci Mat & Nanotechnol, I-07041 Alghero, Sassari, Italy; Assoc CIVEN, Nano Fabricat Facil, I-30175 Venice, Italy; Univ Roma Tor Vergata, CNR, IMM, Area Ric, I-00133 Rome, Italy; Austrian Acad Sci, Inst Biophys & Xray Struct Res, A-8042 Graz, Austria (literal)

Titolo

Electrical responses of silica mesostructured films to changes in environmental humidity and processing conditions (literal)

Abstract

Silica mesoporous films with orthorhombic Fmmm mesostructure have been produced using evaporation induced self-assembling via dip-coating. A block copolymer, Pluronic F-127, has been used its the organic template and hits been removed from the films by thermal calcination. The block copolymer templated films have been characterized as a function of the calcination temperature, in the range 150-550 degrees C by grazing incidence small angle X-ray scattering (GI-SAXS) and Fourier transform infrared spectroscopy. Thermal dehydroxylation formed isolated and geminal silanols on the pore Surface and the removal (if the organic template has increased the water absorption within the pores. The calcination has induced a shrinkage of the pores in the direction normal to the substrate, as it has been observed by GI-SAXS. Humidity sensors based on the mesostructured silica films as sensing membrane have been fabricated using alumina substrates with interdigitated gold fingers. The electrical response of the sensors in different relative humidity (RH) conditions has been measured. In the considered RH range the sensor revealed a high sensitivity with more than 4 orders of magnitude change in the current. Little hysteresis loop has been observed in the electrical response recorded increasing and reducing the RH value. The films calcined between 350 and 450 degrees C showed the best performances in term of stability. hysteresis and reproducibility of the response. The current response hits been correlated with the beater absorption within the pores. (literal)

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