Adsorption induced phase transition in Ti(Pc)2 gas sensing films: A joint AFM-EDXR study (Articolo in rivista)

Type
Label
  • Adsorption induced phase transition in Ti(Pc)2 gas sensing films: A joint AFM-EDXR study (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.matchemphys.2014.09.004 (literal)
Alternative label
  • Generosi A.; Rossi Albertini V.; Pennesi G.; Paci B. (2014)
    Adsorption induced phase transition in Ti(Pc)2 gas sensing films: A joint AFM-EDXR study
    in Materials chemistry and physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Generosi A.; Rossi Albertini V.; Pennesi G.; Paci B. (literal)
Pagina inizio
  • 949 (literal)
Pagina fine
  • 955 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84907710136&partnerID=q2rCbXpz (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 148 (literal)
Rivista
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISM-CNR, Area della Ricerca di Tor Vergata, Via Fosso del Cavaliere 100, 00133 Roma, Italy; ISM-CNR, Area di Ricerca di Montelibretti, Via Salaria Km.29.5, 00116 Monterotondo Scalo, Roma, Italy (literal)
Titolo
  • Adsorption induced phase transition in Ti(Pc)2 gas sensing films: A joint AFM-EDXR study (literal)
Abstract
  • The morphological properties of thin metal phthalocyanine films, used as active material in gas sensing devices, are studied. Morphological changes, such as bulk or surface phase transitions, are key phenomena, having a determinant influence on the final properties and stability of the materials and devices. In this work, we successfully prove that joint in-situ atomic force microscopy and Energy Dispersive X-ray Reflectivity can be used, not only to monitor the sensing activity of bi[phthalocyaninato(2-)]titanium(IV) films, but also as a powerful tool to disclose the physical-chemical process beneath the sensing activity. Indeed it is shown that NOx adsorption activates a phase transition in the TiPc2 film, characterized by an oscillating behavior between two metastable states. Such phenomena endure as long as the gas molecules are present, finally evolving into the thermodynamically most stable phase. Fourier transform infrared spectroscopy analysis supports the above conclusions. (literal)
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