2011年4月，我室纳米材料与化学研究部俞书宏教授研究组在CHEMISTRY-A EUROPEAN JOURNAL上发表题为Selective Synthesis of Fe7Se8 Polyhedra with Exposed High-Index Facets and Fe7Se8 Nanorods by a Solvothermal Process in a Binary Solution and Their Collective Intrinsic Properties的论文。

Source: CHEMISTRY-A EUROPEAN JOURNAL Volume: 17 Issue: 18 Pages: 5067-5074 Published: APR 2011
Gao MR (Gao, Min-Rui)1, Lin ZY (Lin, Zhao-Yang)1, Jiang J (Jiang, Jun)1, Yao HB (Yao, Hong-Bin)1, Lu YM (Lu, Yong-Ming)1, Gao Q (Gao, Qiang)1, Yao WT (Yao, Wei-Tang)1, Yu SH (Yu, Shu-Hong)1
Addresses:
1. Univ Sci & Technol China, Sch Chem & Mat, Hefei Natl Lab Phys Sci Microscale, Div Nanomat & Chem, Hefei 230026, Anhui Peoples R China
E-mail Addresses: shyu@ustc.edu.cn

Reprint Address: Yu, SH (reprint author), Univ Sci & Technol China, Sch Chem & Mat, Hefei Natl Lab Phys Sci Microscale, Div Nanomat & Chem, Hefei 230026, Anhui Peoples R China

Abstract: Fe7Se8 polyhedra with high-index facets and Fe7Se8 nanorods can be selectively synthesized by a solvothermal reaction in a mixed solvent of diethylenetriamine (DETA) and deionized water (DIW). It is found that the morphologies of Fe7Se8 nanocrystals can be effectively controlled by adjusting the volume ratio of DETA and DIW. The unusual polyhedral crystals are bounded by two {001} and twelve {012} facets. The intrinsic properties of Fe7Se8 nanocrystals have been investigated. Magnetic measurements indicate that the obtained polyhedra and nanorods show a weak ferromagnetic ordering at room temperature. In particular, a new photoluminescence emission at 403 nm from the Fe7Se8 nanocrystals has been observed. The described solvothermal reaction in a mixed solvent may be extended to the synthesis of other transition-metal chalcogenide crystals with controlled shape, facets, and structure, which may bring new functionalities.