Formation of BaCrO4 nanoCrystallites within thermally evaporated sodium bis-2-ethylhexyl-sulfosuccinate and stearic acid thin films

Debabrata Rautaray, Kaustav Sinha, Sudhakar R. Sainkar, Renu Pasricha, Neela R. Pavaskar, Murali Sastry

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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 languageEnglish
Pages (from-to)24-27
Number of pages4
JournalJournal of the American Ceramic Society
Issue number1
Publication statusPublished - Jan 2005
Externally publishedYes

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