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Development of nanoscale inhomogeneities during drying of sol-gel derived amorphous lead zirconate titanate precursor thin films.
Stawski, Tomasz M; Veldhuis, Sjoerd A; Castricum, Hessel L; Keim, Enrico G; Eeckhaut, Guy; Bras, Wim; Blank, Dave H A; ten Elshof, Johan E.
Afiliação
  • Stawski TM; MESA+ Institute for Nanotechnology, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands.
Langmuir ; 27(17): 11081-9, 2011 Sep 06.
Article em En | MEDLINE | ID: mdl-21736322
ABSTRACT
The structural evolution of sol-gel derived lead zirconate titanate (PZT) precursor films during and after physical drying was investigated by transmission electron microscopy (TEM), electron energy loss spectroscopy (EELS), selected area electron diffraction (SAED), and time-resolved X-ray diffraction (XRD). Films were deposited from initial 0.3 mol/dm(3) precursor sols with varying hydrolysis ratios. Zr-rich grains of 1-10 nm size, embedded in a Pb-, Zr-, and Ti-containing amorphous matrix were found in as-dried films. The Zr-rich regions were crystalline at hydrolysis ratios [H(2)O]/[PZT] < 27.6, and amorphous at ratios > 100. X-ray diffraction analysis of PZT and zirconia sols revealed that the crystalline nanoparticles in both sols are identical and are probably composed of nanosized zirconium oxoacetate-like clusters. This study demonstrates that time-resolved X-ray diffraction combined with electron energy loss spectroscopy mapping is a powerful tool to monitor the nanoscale structural evolution of sol-gel derived thin films.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Titânio / Zircônio / Nanoestruturas / Chumbo / Membranas Artificiais Idioma: En Ano de publicação: 2011 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Titânio / Zircônio / Nanoestruturas / Chumbo / Membranas Artificiais Idioma: En Ano de publicação: 2011 Tipo de documento: Article