Hostname: page-component-77c89778f8-m8s7h Total loading time: 0 Render date: 2024-07-17T11:09:13.551Z Has data issue: false hasContentIssue false

Production and characterization of titanium and iron oxide nano-sized thin films

Published online by Cambridge University Press:  31 January 2011

E. Comini
Affiliation:
INFM and Dip. di Chimica Fisica per l'Ingegneria e per i Materiali, Via Valotti 9, I–25133 Brescia, Italy
G. Sberveglieri
Affiliation:
INFM and Dip. di Chimica Fisica per l'Ingegneria e per i Materiali, Via Valotti 9, I–25133 Brescia, Italy
M. Ferroni
Affiliation:
Dipartimento di Fisica, Universitàdi Ferrara and INFM Via Paradiso 12, I–44100 Ferrara, Italy
V. Guidi
Affiliation:
Dipartimento di Fisica, Universitàdi Ferrara and INFM Via Paradiso 12, I–44100 Ferrara, Italy INFN, sezione di Ferrara, Ferrara, Italy
C. Frigeri
Affiliation:
Istituto CNR-MASPEC Parco Area Delle Scienze, I–43100 Parma, Italy
D. Boscarino
Affiliation:
Laboratori Nazionali Legnaro, INFN, Via Romea 4, I–35020, Legnaro (Padova), Italy
Get access

Abstract

We present a simple and reproducible method to obtain TiO2 and Fe2O3 mixed-oxide thin films by reactive radio-frequency sputtering. The influence of iron concentration on the structural properties of the layers has been studied. Structural characterization, carried out by electron microscopy analysis, allowed one to correlate the inhibition of the grain growth of titania to the presence of iron oxide and to its segregation at grain boundaries. This behavior should be ascribed to a superficial-tension phenomenon. As a possible application of these thin films, we have investigated the gas-sensing properties toward CO, with particular focus on the role of Fe. The layers were capable to sense CO down to the level requested for environmental monitoring.

Type
Articles
Copyright
Copyright © Materials Research Society 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Sberveglieri, G., Sens. Actuators, B 23, 103 (1995).CrossRefGoogle Scholar
2.Gardner, J. and Bartlett, P., Electronic Noses Principles and Applications (Oxford University Press, New York, 1999), Chap. 3.CrossRefGoogle Scholar
3.Guidi, V., et al., Sens. Actuators, B 57, 197 (1999).CrossRefGoogle Scholar
4.Macleod, H., Thin Film Optical Filters, 2nd ed. (Macmillan, New York, 1986).CrossRefGoogle Scholar
5.Sberveglieri, G., et al., Adv. Mater. 8, 334 (1996).CrossRefGoogle Scholar
6.Carotta, M., Ferroni, M., Guidi, V., and Martinelli, G., Adv. Mater. 11, 943 (1999).3.0.CO;2-L>CrossRefGoogle Scholar
7.Kirner, U., et al., Sens. Actuators, B 1, 103 (1990).CrossRefGoogle Scholar
8.Paz, I., Luo, Z., Radenberg, L., and Haller, A., J. Mater. Res. 10, 2842 (1995).CrossRefGoogle Scholar
9.Brinker, C. and Scherer, G., Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing (Academic Press Inc., New York, 1990).Google Scholar
10.Ferroni, M., Faglia, G., Guidi, V., Martinelli, G., Nelli, P., and Sberveglieri, G., Nanostruct. Mater. 7, 709 (1996).CrossRefGoogle Scholar
11.Bally, A.R., Korobeinikova, E.N., Schmid, P.E., Lévy, F., and Bussy, F., J. Phys. D 31, 1149 (1998).CrossRefGoogle Scholar
12.Doolittle, L., Nucl. Instrum. Methods, B 15, 227 (1986).CrossRefGoogle Scholar
13.Sberveglieri, G., Depero, L., Groppelli, S., and Nelli, P., Sens. Actuators, B 26–27, 89 (1995).CrossRefGoogle Scholar
14.Yamazoe, N. and Miura, N., in Some basic aspects of semiconduc-tor gas sensors in Chemical Sensor Technology, edited by Yamauchi, S. (Kodansha Elsevier, Amsterdam, The Netherlands, 1992), Vol. 4, p. 19.Google Scholar
15.Bonini, N., Carotta, M.C., Chiorino, A., Guidi, V., Malagú, C., Martinelli, G., Paglialonga, L., and Sacerdoti, M., Sens. Actuators, B 68, 274 (2000).CrossRefGoogle Scholar
16.Gribb, A. and Banfield, J., Am. Mineral. 82, 717 (1997).CrossRefGoogle Scholar
17.Gouma, P., Dutta, P.K., and Mills, M., Nanostruct. Mater. 11, 1231 (1999).CrossRefGoogle Scholar
18.Hara, K. and Nishida, N., Sens. Actuators, B 20, 181 (1994).CrossRefGoogle Scholar
19.Minicò, S., Scirè, S., Crisafulli, C., Visco, A., and Galvagno, S., Catal. Lett. 47, 273 (1997).CrossRefGoogle Scholar
20.Morrison, S.R., The Chemical Physics of Surfaces (Plenum Press, New York, 1977).CrossRefGoogle Scholar