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Direct synthesis of ultrafine tetragonal BaTiO3 nanoparticles at room temperature.

Qi JQ, Peng T, Hu YM, Sun L, Wang Y, Chen WP, Li LT, Nan CW, Chan HL - Nanoscale Res Lett (2011)

Bottom Line: The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized.The phase transition of the as-prepared nanoparticles is investigated by the temperature-dependent Raman spectrum and shows the similar tendency to that of bulk BaTiO3 materials.It is confirmed that the nanoparticles have tetragonal phase at room temperature.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Sciences and Engineering, Northeastern University at Qinhuangdao Branch, Qinhuangdao, Hebei Province, 066004, Peoples Republic of China. jianquanqi@mail.tsinghua.edu.cn.

ABSTRACT
A large quantity of ultrafine tetragonal barium titanate (BaTiO3) nanoparticles is directly synthesized at room temperature. The crystalline form and grain size are checked by both X-ray diffraction and transmission electron microscopy. The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized. The phase transition of the as-prepared nanoparticles is investigated by the temperature-dependent Raman spectrum and shows the similar tendency to that of bulk BaTiO3 materials. It is confirmed that the nanoparticles have tetragonal phase at room temperature.

No MeSH data available.


TEM image.
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Figure 2: TEM image.

Mentions: The TEM is used for a clear observation in details as shown in Figure 2. The left of Figure 2 is a low-magnitude image, and the average grain size is estimated as approximately 7 nm which also quite agrees with the XRD estimation. The high-magnitude image is shown on the right to show more details of the grain lattice. Regularly arranged patterns can be observed in the darker region of the photo, indicating that the particles under observation are well crystallized. Three patterns of the lattice spacings are observed, such as 4.05, 2.87, and 2.35 Å which match the (100), (110), and (111) perovskite lattice planes, respectively.


Direct synthesis of ultrafine tetragonal BaTiO3 nanoparticles at room temperature.

Qi JQ, Peng T, Hu YM, Sun L, Wang Y, Chen WP, Li LT, Nan CW, Chan HL - Nanoscale Res Lett (2011)

TEM image.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211978&req=5

Figure 2: TEM image.
Mentions: The TEM is used for a clear observation in details as shown in Figure 2. The left of Figure 2 is a low-magnitude image, and the average grain size is estimated as approximately 7 nm which also quite agrees with the XRD estimation. The high-magnitude image is shown on the right to show more details of the grain lattice. Regularly arranged patterns can be observed in the darker region of the photo, indicating that the particles under observation are well crystallized. Three patterns of the lattice spacings are observed, such as 4.05, 2.87, and 2.35 Å which match the (100), (110), and (111) perovskite lattice planes, respectively.

Bottom Line: The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized.The phase transition of the as-prepared nanoparticles is investigated by the temperature-dependent Raman spectrum and shows the similar tendency to that of bulk BaTiO3 materials.It is confirmed that the nanoparticles have tetragonal phase at room temperature.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Sciences and Engineering, Northeastern University at Qinhuangdao Branch, Qinhuangdao, Hebei Province, 066004, Peoples Republic of China. jianquanqi@mail.tsinghua.edu.cn.

ABSTRACT
A large quantity of ultrafine tetragonal barium titanate (BaTiO3) nanoparticles is directly synthesized at room temperature. The crystalline form and grain size are checked by both X-ray diffraction and transmission electron microscopy. The results revealed that the perovskite nanoparticles as fine as 7 nm have been synthesized. The phase transition of the as-prepared nanoparticles is investigated by the temperature-dependent Raman spectrum and shows the similar tendency to that of bulk BaTiO3 materials. It is confirmed that the nanoparticles have tetragonal phase at room temperature.

No MeSH data available.