Langmuir-Blodgett (LB) films are utilized as sensing materials for many different chemical sensors. This technique allows the fabrication of very thin films, down to one single monolayer. As is well known from classical material science, there is a minimum number of elementary blocks (atoms or molecules) that have to be aggregated before the material properties can be assessed. To this regard, molecular films tend to behave in a different way; since the basic block isa complex molecule, most of the properties are found in the single molecule. This opens the possibility of obtaining materials for which the surface to volume ratio can be maximized in order to increase, for instance, the sensor sensitivity. In this paper, some aspects related to the electronic structure of LB films of porphyrinoids are studied by the Kelvin probe technique as a function of the number of monolayers. Results show that the material properties are, in the case of corrole, confined to the single molecule, while in the case of sapphyrin, a build-up process seems to take place, so that many monolayers are necessary to establish the bulk material properties. (C) 1999 Elsevier Science S.A. All rights reserved.

DI NATALE, C., Goletti, C., Paolesse, R., Drago, M., Macagnano, A., Mantini, A., et al. (1999). Kelvin probe investigation of the thickness effects in Langmuir-Blodgett films of pyrrolic macrocycles sensitive to volatile compounds in gas phase. In Sensors and Actuators, B: Chemical (pp.183-187). LAUSANNE : Elsevier Sequoia SA, Lausanne, Switzerland [10.1016/S0925-4005(99)00143-4].

Kelvin probe investigation of the thickness effects in Langmuir-Blodgett films of pyrrolic macrocycles sensitive to volatile compounds in gas phase

DI NATALE, CORRADO;GOLETTI, CLAUDIO;PAOLESSE, ROBERTO;D'AMICO, ARNALDO
1999-01-01

Abstract

Langmuir-Blodgett (LB) films are utilized as sensing materials for many different chemical sensors. This technique allows the fabrication of very thin films, down to one single monolayer. As is well known from classical material science, there is a minimum number of elementary blocks (atoms or molecules) that have to be aggregated before the material properties can be assessed. To this regard, molecular films tend to behave in a different way; since the basic block isa complex molecule, most of the properties are found in the single molecule. This opens the possibility of obtaining materials for which the surface to volume ratio can be maximized in order to increase, for instance, the sensor sensitivity. In this paper, some aspects related to the electronic structure of LB films of porphyrinoids are studied by the Kelvin probe technique as a function of the number of monolayers. Results show that the material properties are, in the case of corrole, confined to the single molecule, while in the case of sapphyrin, a build-up process seems to take place, so that many monolayers are necessary to establish the bulk material properties. (C) 1999 Elsevier Science S.A. All rights reserved.
12th European Conference on Solid-State Transducers - 9th UK Conference on Sensors and Their Applications
Southampton, UK
13 September 1998 through 16 September 1998
Rilevanza internazionale
contributo
Settore FIS/03 - Fisica della Materia
English
Adsorption; Chemical sensors; Deposition; Electronic structure; Molecules; Monolayers; Organic compounds; Corrole; Gas phase; Kelvin probe technique; Porphyrinoids; Pyrrolic macrocycles; Sapphyrin; Langmuir Blodgett films
Intervento a convegno
DI NATALE, C., Goletti, C., Paolesse, R., Drago, M., Macagnano, A., Mantini, A., et al. (1999). Kelvin probe investigation of the thickness effects in Langmuir-Blodgett films of pyrrolic macrocycles sensitive to volatile compounds in gas phase. In Sensors and Actuators, B: Chemical (pp.183-187). LAUSANNE : Elsevier Sequoia SA, Lausanne, Switzerland [10.1016/S0925-4005(99)00143-4].
DI NATALE, C; Goletti, C; Paolesse, R; Drago, M; Macagnano, A; Mantini, A; Troitsky, V; Berzina, T; Cocco, M; D'Amico, A
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/43622
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact