Paper Title:
Synthesis of Thin Film by Self-Assembly of Perovskite Nanosheets
  Abstract

Layered perovskite, K2NbO3F, includes rock-salt type KF blocks in a K2NiF4 type structure. After the KF blocks are dissolved selectively in water at room temperature, the resultant colloidal suspension consists of nanosheet forms. Positively charged K+ ions in colloidal suspension act as an inorganic binder in electrostatic self-assembly with an exfoliated perovskite nanosheet. In the present study, we synthesized a KNbO3 thin film on a quartz substrate using a self-assembly process. The thin film on a quartz substrate was characterized using XRD analysis. The molar extinction coefficient of the colloidal suspension and absorbance of the thin film were examined using UV-vis absorption spectra. Respective thicknesses of perovskite nanosheet aggregate thin films were examined using AFM. The UV-vis absorption spectra of the films showed an increase in absorbance with increasing immersion time, suggesting growth of a self-assembled multilayer comprising perovskite nanosheets and K+ ions.

  Info
Periodical
Edited by
Masaru Miyayama, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki
Pages
99-104
DOI
10.4028/www.scientific.net/KEM.301.99
Citation
A. Sugawara, K. Uematsu, K. Toda, M. Sato, "Synthesis of Thin Film by Self-Assembly of Perovskite Nanosheets", Key Engineering Materials, Vol. 301, pp. 99-104, 2006
Online since
January 2006
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$32.00
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