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Formation of ultra-thin ceramic TiO2 films by the Langmuir-Blodgett technique - a two dimensional sol-gel process at the air-water interface

Oswald, Monika ; Hessel, Volker ; Riedel, Ralf :
Formation of ultra-thin ceramic TiO2 films by the Langmuir-Blodgett technique - a two dimensional sol-gel process at the air-water interface.
In: Thin solid films, 339 (1-2) pp. 284-289.
[Artikel], (1999)

Kurzbeschreibung (Abstract)

Different molecular titanium alkoxides were investigated as precursors for the synthesis of thin to ultra-thin TiO2 ceramic films. The films were prepared by the Langmuir–Blodgett technique. Therefore, the precursor was dissolved in CHCl3 and subsequently spread on water, aqueous acetic acid and aqueous acetylacetone as the subphase. Hydrolysis of the titanium alkoxides, namely Ti(OR)4−x(OR′)x with x=0 (R=n-C4H9 or n-C9H19) and x=2 (R=n-C4H9 and View the MathML source) and [(RO)2Ti-O-]n with R=n-C4H9 was performed at the air–water interface. This reaction can be considered as a two-dimensional sol-gel-process. The surface-pressure–area (π–A) isotherms as well as the influence of the molecular structure of the precursor on the morphology of the resulting condensation products (gels) are discussed. Pyrolysis of the transferred gels under oxygen atmosphere up to 700°C gives the desired TiO2-layers.

Typ des Eintrags: Artikel
Erschienen: 1999
Autor(en): Oswald, Monika ; Hessel, Volker ; Riedel, Ralf
Titel: Formation of ultra-thin ceramic TiO2 films by the Langmuir-Blodgett technique - a two dimensional sol-gel process at the air-water interface
Sprache: Englisch
Kurzbeschreibung (Abstract):

Different molecular titanium alkoxides were investigated as precursors for the synthesis of thin to ultra-thin TiO2 ceramic films. The films were prepared by the Langmuir–Blodgett technique. Therefore, the precursor was dissolved in CHCl3 and subsequently spread on water, aqueous acetic acid and aqueous acetylacetone as the subphase. Hydrolysis of the titanium alkoxides, namely Ti(OR)4−x(OR′)x with x=0 (R=n-C4H9 or n-C9H19) and x=2 (R=n-C4H9 and View the MathML source) and [(RO)2Ti-O-]n with R=n-C4H9 was performed at the air–water interface. This reaction can be considered as a two-dimensional sol-gel-process. The surface-pressure–area (π–A) isotherms as well as the influence of the molecular structure of the precursor on the morphology of the resulting condensation products (gels) are discussed. Pyrolysis of the transferred gels under oxygen atmosphere up to 700°C gives the desired TiO2-layers.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Thin solid films
Band: 339
(Heft-)Nummer: 1-2
Freie Schlagworte: TiO2films, Langmuir–Blodgett technique, Sol-gel process, Air–water interface
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Disperse Feststoffe, Dispersive Solids
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 19 Nov 2008 16:23
Sponsoren: R.R. thanks the Fonds der Chemischen Industrie for financial support.
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