Abstract
We measured the size- and shape-dependent compressibility of the TiO 2 anatase nanoparticles using monochromatic synchrotron X-ray powder diffraction and high-pressure diamond-anvil cell techniques. Compared to the bulk anatase sample, the rice-shaped (3.8 × 5.0 nm) and the rod-shaped (3.5 × 21.0 nm) anatase nanoparticles exhibit reduced and enhanced bulk modulus, respectively, ranging between 204(8) and 319(20) GPa. The Williamson-Hall plot analysis of the measured diffraction data from the bulk sample shows that the pressure-dependent increase of the microscopic strain is isotropic, whereas the Strokes-Wilson profile analyses on the two resolved Bragg peaks from the anatase nanoparticles reveal anisotropic distribution and evolution of the relative strain. This might be attributed to the higher c-axial compressibility and also to the higher population contrast of the hard TiO 6 and soft O6 octahedra in the nanoparticle samples compared to the bulk sample.
| Original language | English |
|---|---|
| Pages (from-to) | 9627-9631 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry C |
| Volume | 112 |
| Issue number | 26 |
| DOIs | |
| Publication status | Published - 2008 Jul 3 |
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All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials
- Surfaces, Coatings and Films
- Energy(all)
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Shape-dependent compressibility of TiO2 anatase nanoparticles. / Park, Seung Won; Jang, Jung Tak; Cheon, Jinwoo; Lee, Hyun Hwi; Lee, Dong Ryeol; Lee, Yongjae.
In: Journal of Physical Chemistry C, Vol. 112, No. 26, 03.07.2008, p. 9627-9631.Research output: Contribution to journal › Article
TY - JOUR
T1 - Shape-dependent compressibility of TiO2 anatase nanoparticles
AU - Park, Seung Won
AU - Jang, Jung Tak
AU - Cheon, Jinwoo
AU - Lee, Hyun Hwi
AU - Lee, Dong Ryeol
AU - Lee, Yongjae
PY - 2008/7/3
Y1 - 2008/7/3
N2 - We measured the size- and shape-dependent compressibility of the TiO 2 anatase nanoparticles using monochromatic synchrotron X-ray powder diffraction and high-pressure diamond-anvil cell techniques. Compared to the bulk anatase sample, the rice-shaped (3.8 × 5.0 nm) and the rod-shaped (3.5 × 21.0 nm) anatase nanoparticles exhibit reduced and enhanced bulk modulus, respectively, ranging between 204(8) and 319(20) GPa. The Williamson-Hall plot analysis of the measured diffraction data from the bulk sample shows that the pressure-dependent increase of the microscopic strain is isotropic, whereas the Strokes-Wilson profile analyses on the two resolved Bragg peaks from the anatase nanoparticles reveal anisotropic distribution and evolution of the relative strain. This might be attributed to the higher c-axial compressibility and also to the higher population contrast of the hard TiO 6 and soft O6 octahedra in the nanoparticle samples compared to the bulk sample.
AB - We measured the size- and shape-dependent compressibility of the TiO 2 anatase nanoparticles using monochromatic synchrotron X-ray powder diffraction and high-pressure diamond-anvil cell techniques. Compared to the bulk anatase sample, the rice-shaped (3.8 × 5.0 nm) and the rod-shaped (3.5 × 21.0 nm) anatase nanoparticles exhibit reduced and enhanced bulk modulus, respectively, ranging between 204(8) and 319(20) GPa. The Williamson-Hall plot analysis of the measured diffraction data from the bulk sample shows that the pressure-dependent increase of the microscopic strain is isotropic, whereas the Strokes-Wilson profile analyses on the two resolved Bragg peaks from the anatase nanoparticles reveal anisotropic distribution and evolution of the relative strain. This might be attributed to the higher c-axial compressibility and also to the higher population contrast of the hard TiO 6 and soft O6 octahedra in the nanoparticle samples compared to the bulk sample.
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U2 - 10.1021/jp801555a
DO - 10.1021/jp801555a
M3 - Article
AN - SCOPUS:53549086397
VL - 112
SP - 9627
EP - 9631
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 26
ER -