Structural Characterizations of Organo-Capped Barium Titanate Nanoparticles Prepared by the Wet Chemical Route
✍ Scribed by Xuedong Wu; Ling Zou; Shengrong Yang; Dapu Wang
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 98 KB
- Volume
- 239
- Category
- Article
- ISSN
- 0021-9797
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✦ Synopsis
In the present study, nanoscale barium titanate particles were chemically prepared with organic shells on their surfaces. Their chemical and physical structures were characterized by FT-IR, FT-Raman, XRD, and XPS. Based on the results of characterizations, it can be concluded that the presence of organic ligands greatly influences the nucleation and surface chemistry of BaTiO 3 nanoparticles. Surface Ti 4+ tends to bond to stearate ions instead of the previous Ba 2+ in the starting materials. The usual preferable orientation growths of lattice, i.e., ( 101), (111), and (200), were significantly restrained due to surface coordination. Although poor crystallinity was observed, a tetragonal phase of BaTiO 3 nuclei could be inferred from both XRD and Raman patterns. Finally, the formation mechanism and structural model of organo-capped nanoparticles are discussed.