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[en] Hybrid organic-inorganic nanostructured layers are of significant interest for the development of sensitive layers for chemical sensors and arrays. Nanostructured surface usually allows to increase the sensitivity and stability of sensor response comparing with''flat''film of the same material. This is due to the increase of the surface area. But in the same time, the combination of certain semiconducting materials opens wide possibilities for the directed control of the adsorption properties of the resulted hybrid film. We investigated the adsorption properties of the composites made of ZnO nanostructured under layer and a 30 nm phthalocyanine (Pc) thermally sputtered on it. The two types of ZnO layers are of interest for creating of chemical sensors due to their high sensitivity and variability of the response to different analytes. The adsorption properties of H 2 Pc, CuPc and PbPc were previousely investigated. Interaction between donor Pc and acceptor ZnO affects the adsorption centers of the Pc film. The combination with ZnO nanostructured layers increases the sensitivity of Pc films (about one order at low concentrations) but, what is more important, changes their adsorption behavior as well. The combination of Pcs with ZnO NP opens wide field for the creation of chemical sensors with overlapping but different sensitivity profiles-exactly what is necessary for cross-reactive sensor arrays for electronic nose technology.(author)
Publication date: 
1 Jan 2022

J Burlachenko, B Snopok, M Epifani, S Capone, P Siciliano

Biblio References: 
Pages: 41
Nano Studies