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High Bulk Modulus of Nanocrystal γ-Fe2O3 with Chemical Dodecyl Benzene Sulfonic Decoration Under High Pressure |
| ZHAO Jing1;GUO Lin1;LIU Jing1;YANG Yang1;CHE Rong-Zheng2;ZHOU Lei1 |
| 1Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
2Institute of Physics, Chinese Academy of Sciences, Beijing 100080
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| Cite this article: |
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ZHAO Jing, GUO Lin, LIU Jing et al 2000 Chin. Phys. Lett. 17 126-128 |
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Abstract Structural transformation in γ-Fe2O3 nanocrystals (about 10 nm) with dodecyl benzene sulfonic (DBS) coated is studied by using high-pressure energy dispersive x-ray diffraction of synchrotron radiation and high-resolution transmission electron microscopy (HRTEM). Relative to the bulk crystal, the transition pressure showed a decrease while the compressibility increases significantly up to 375 (±9 GPa). HRTEM picture confirmed that there is surface cladding surrounding nanocrystals due to DBS, which formed new special boundaries between nanocrystals and should be different from the ordinary grain boundaries. The experimental results imply that the surface layers of γ-Fe2O3 nanocrystals have strong effect on the compressibility.
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| Keywords:
64.70.Kb
62.50.+p
64.70.-p
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Published: 01 February 2000
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