Identification of the reconstruction and bonding structure of SiC nanocrystal surface by infrared spectroscopy

J.Y. Fan; H.X. Li; N. Zhang; R.F. Lu

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Identification of the reconstruction and bonding structure of SiC nanocrystal surface by infrared spectroscopy

机译：红外光谱法鉴定SiC纳米晶表面的重建和结合结构

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We studied the surface structures of the cubic SiC nanocrystals by use of infrared spectroscopy. It was found that the Si-Si surface reconstruction occurs significantly in these nanocrystals. Besides, the oxygen bridge bond dominates their surface structure, which ensures the occurrence of ultra stable quantum-confinement photoluminescence. The larger crystallites exhibit much weaker infrared signals, but show longitudinal phonon mode that is absent in the small particles. The nanocrystals dispersed in lower-polarity solvent exhibit additional surface bonding structure other than that in water solvent.

机译：我们通过红外光谱研究了立方SiC纳米晶体的表面结构。发现在这些纳米晶体中Si-Si表面重构显着发生。此外，氧桥键主导着其表面结构，从而确保了超稳定的量子约束光致发光的发生。较大的微晶显示出弱得多的红外信号，但显示出在小颗粒中不存在的纵向声子模式。分散在低极性溶剂中的纳米晶体除了在水溶剂中显示出其他表面键合结构。

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来源
《Applied Surface Science》 |2011年第1期|p.627-630|共4页
作者
J.Y. Fan; H.X. Li; N. Zhang; R.F. Lu;
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作者单位

Department of Physics, Southeast University, Nanjing 211189, People's Republic of China;

Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China;

Department of Physics, Southeast University, Nanjing 211189, People's Republic of China;

Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China;

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正文语种 eng
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关键词
SiC quantum dot; surface structure; surface reconstruction;

机译：SiC量子点表面结构表面重建;

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Identification of the reconstruction and bonding structure of SiC nanocrystal surface by infrared spectroscopy

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