Formation of BaCrO4 NanoCrystallites within Thermally Evaporated Sodium Bis-2-Ethylhexyl-Sulfosuccinate and Stearic Acid Thin Films

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...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2005-01, Vol.88 (1), p.24-27
Main Authors: Rautaray, Debabrata, Sinha, Kaustav, Sainkar, Sudhakar R., Pasricha, Renu, Pavaskar, Neela R., Sastry, Murali
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Physics
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Summary: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) BaCrO4 crystals indicating that efficient size control over crystal size may be exercised by the matrix. Contact angle measurements of the BaCrO4–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.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2004.00010.x