Oswald, Monika ; Hessel, Volker ; Riedel, Ralf (1999)
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)
doi: 10.1016/S0040-6090(98)01228-0
Artikel, Bibliographie
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 |
| Art des Eintrags: | Bibliographie |
| 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 |
| Publikationsjahr: | 8 Februar 1999 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Thin Solid Films |
| Jahrgang/Volume einer Zeitschrift: | 339 |
| (Heft-)Nummer: | 1-2 |
| DOI: | 10.1016/S0040-6090(98)01228-0 |
| 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. |
| Freie Schlagworte: | TiO2films, Langmuir–Blodgett technique, Sol-gel process, Air–water interface |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe |
| Hinterlegungsdatum: | 19 Nov 2008 16:23 |
| Letzte Änderung: | 16 Dez 2020 14:51 |
| PPN: | |
| Sponsoren: | R.R. thanks the Fonds der Chemischen Industrie for financial support. |
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