Fabrication of nanoparticulate porous LaOF films through film growth and thermal decomposition of ion-modified lanthanum diacetate hydroxide

Eiji Hosono, Shinobu Fujihara, Toshio Kimura

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

This paper first reports fabrication of macro/nanotextured rare-earth oxyfluoride films. Usage of ion-modified lanthanum diacetate hydroxide (LDAH) as self-templates was successful in producing nanoparticulate lanthanum oxyfluoride (LaOF) films. LDAH template films were deposited on glass substrates through a chemical bath deposition in solutions composed of lanthanum acetate sesquihydrate, methanol, trifluoroacetic acid, and aqueous ammonia. The LDAH films had a unique, nestlike morphology owing to a two-dimensional hexagonal crystal growth. Modification of LDAH with trifluoroacetate ions led to formation of LaOF after pyrolyzing the template films at temperatures of 400-600°C in air. The resultant LaOF films had a nanoparticulate porous microstructure, maintaining the morphology of the original LDAH template films. It was also successful to incorporate Eu3+ ions into LaOF through deposition of the LDAH film in a solution containing europium acetate tetrahydrate. The characteristic photoluminescence from Eu3+ was observed with an ultraviolet-light excitation at 273 nm, indicating that Eu3+ was homogeneously distributed in LaOF host crystals. Thus the ion-modification of LDAH was also demonstrated to be a useful method for preparing nanostructured rare-earth oxyfluoride materials having various cationic compositions.

Original languageEnglish
Pages (from-to)3769-3774
Number of pages6
JournalLangmuir
Volume20
Issue number9
DOIs
Publication statusPublished - 2004 Apr 27

Fingerprint

oxyfluorides
Lanthanum
Film growth
lanthanum
hydroxides
thermal decomposition
Pyrolysis
Ions
decomposition
Fabrication
fabrication
ions
templates
Trifluoroacetic Acid
fluorine monoxide
hydroxide ion
Rare earths
acetates
Acetates
rare earth elements

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Fabrication of nanoparticulate porous LaOF films through film growth and thermal decomposition of ion-modified lanthanum diacetate hydroxide. / Hosono, Eiji; Fujihara, Shinobu; Kimura, Toshio.

In: Langmuir, Vol. 20, No. 9, 27.04.2004, p. 3769-3774.

Research output: Contribution to journalArticle

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