Surface composition of alkali-dope TiO2 films for sensors investigated by XPS

Roberto Zanoni; Guido Righini; Angelo Montenero; Guglielmina Gnappi; Andrea Bearzotti; Giampiero Montesperelli; Enrico Traversa

doi:10.1016/0925-4005(95)85195-X

Surface composition of alkali-dope TiO₂ films for sensors investigated by XPS

Roberto Zanoni^*, Guido Righini, Angelo Montenero, Guglielmina Gnappi, Andrea Bearzotti, Giampiero Montesperelli, Enrico Traversa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

X-ray photoelectron spectroscopy (XPS) results are presented on a series of alkali-doped and undoped TiO₂ films prepared by the sol-gel technique. TiO₂ films are deposited onto Al₂O₃ and quartz substrates, using titanium isopropylalkoxide as the prescursor, by dip-coating from the appropriate solutions. After dipping, the films are dried at 100 °C for one day and then heated to 300 °C for 30 min. The surface composition of the films is discussed, and the effects of Li, Na and K doping are compared. The effect of doping on the humidity-sensitive electrical properties of the films is evaluated by measuring the current flowing at various relative-humidity values upon application of a constant d.c. voltage.

Original language	English (US)
Pages (from-to)	886-888
Number of pages	3
Journal	Sensors and Actuators: B. Chemical
Volume	25
Issue number	1-3
DOIs	https://doi.org/10.1016/0925-4005(95)85195-X
State	Published - Apr 1995
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the National Research Council of Italy (CNR), under the auspices of the Targeted Project ‘Special Materials for Advanced Technologies’.

Keywords

Humidity sensors
Titania
X-ray photoelectron spectroscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1016/0925-4005(95)85195-X

Cite this

@article{feca23bb89394d108689dda0d0278202,

title = "Surface composition of alkali-dope TiO2 films for sensors investigated by XPS",

abstract = "X-ray photoelectron spectroscopy (XPS) results are presented on a series of alkali-doped and undoped TiO2 films prepared by the sol-gel technique. TiO2 films are deposited onto Al2O3 and quartz substrates, using titanium isopropylalkoxide as the prescursor, by dip-coating from the appropriate solutions. After dipping, the films are dried at 100 °C for one day and then heated to 300 °C for 30 min. The surface composition of the films is discussed, and the effects of Li, Na and K doping are compared. The effect of doping on the humidity-sensitive electrical properties of the films is evaluated by measuring the current flowing at various relative-humidity values upon application of a constant d.c. voltage.",

keywords = "Humidity sensors, Titania, X-ray photoelectron spectroscopy",

author = "Roberto Zanoni and Guido Righini and Angelo Montenero and Guglielmina Gnappi and Andrea Bearzotti and Giampiero Montesperelli and Enrico Traversa",

note = "Funding Information: This work was supported by the National Research Council of Italy (CNR), under the auspices of the Targeted Project {\textquoteleft}Special Materials for Advanced Technologies{\textquoteright}.",

year = "1995",

month = apr,

doi = "10.1016/0925-4005(95)85195-X",

language = "English (US)",

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pages = "886--888",

journal = "Sensors and Actuators: B. Chemical",

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publisher = "Elsevier",

number = "1-3",

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TY - JOUR

T1 - Surface composition of alkali-dope TiO2 films for sensors investigated by XPS

AU - Zanoni, Roberto

AU - Righini, Guido

AU - Montenero, Angelo

AU - Gnappi, Guglielmina

AU - Bearzotti, Andrea

AU - Montesperelli, Giampiero

AU - Traversa, Enrico

N1 - Funding Information: This work was supported by the National Research Council of Italy (CNR), under the auspices of the Targeted Project ‘Special Materials for Advanced Technologies’.

PY - 1995/4

Y1 - 1995/4

N2 - X-ray photoelectron spectroscopy (XPS) results are presented on a series of alkali-doped and undoped TiO2 films prepared by the sol-gel technique. TiO2 films are deposited onto Al2O3 and quartz substrates, using titanium isopropylalkoxide as the prescursor, by dip-coating from the appropriate solutions. After dipping, the films are dried at 100 °C for one day and then heated to 300 °C for 30 min. The surface composition of the films is discussed, and the effects of Li, Na and K doping are compared. The effect of doping on the humidity-sensitive electrical properties of the films is evaluated by measuring the current flowing at various relative-humidity values upon application of a constant d.c. voltage.

AB - X-ray photoelectron spectroscopy (XPS) results are presented on a series of alkali-doped and undoped TiO2 films prepared by the sol-gel technique. TiO2 films are deposited onto Al2O3 and quartz substrates, using titanium isopropylalkoxide as the prescursor, by dip-coating from the appropriate solutions. After dipping, the films are dried at 100 °C for one day and then heated to 300 °C for 30 min. The surface composition of the films is discussed, and the effects of Li, Na and K doping are compared. The effect of doping on the humidity-sensitive electrical properties of the films is evaluated by measuring the current flowing at various relative-humidity values upon application of a constant d.c. voltage.

KW - Humidity sensors

KW - Titania

KW - X-ray photoelectron spectroscopy

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DO - 10.1016/0925-4005(95)85195-X

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