Abstract
This paper describes the growth of barium chromate (BaCrO4) nanocrystallites within thermally evaporated thin films of stearic acid (StA) and sodium bis-2-ethylhexyl-sulfosuccinate by a process of Ba2+ ion entrapment followed by in situ reaction with CrO42- ions. Dense spherical assemblies of BaCrO4 nanocrystallites of very uniform size (∼ 50 nm) were obtained within the two different host matrices. The spherical assemblies were composed of smaller (ca. 5-10 nm size) BaCrO 4 crystals indicating that efficient size control over crystal size may be exercised by the matrix. Contact angle measurements of the BaCrO 4-StA and BaCrO4-sodium bis-2-ethylhexyl-sulfosuccinate films indicated that they were hydrophobic, thus pointing to the possible role of hydrophobic interaction between the StA and sodium bis-2-ethylhexyl- sulfosuccinate monolayer-covered BaCrO4 crystals in the assembly process.
Original language | English (US) |
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Pages (from-to) | 24-27 |
Number of pages | 4 |
Journal | Journal of the American Ceramic Society |
Volume | 88 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2005 |
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry