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

Min-Rui Gao; Zhao-Yang Lin; Jun Jiang; Hong-Bin Yao; Yong-Ming Lu; Qiang Gao; Wei-Tang Yao; Shu-Hong Yu

doi:10.1002/chem.201002203

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

Chemistry. 2011 Apr 26;17(18):5068-75. doi: 10.1002/chem.201002203. Epub 2011 Mar 23.

Authors

Min-Rui Gao¹, Zhao-Yang Lin, Jun Jiang, Hong-Bin Yao, Yong-Ming Lu, Qiang Gao, Wei-Tang Yao, Shu-Hong Yu

Affiliation

¹ Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, School of Chemistry & Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.

PMID: 21433117
DOI: 10.1002/chem.201002203

Abstract

Fe(7)Se(8) polyhedra with high-index facets and Fe(7)Se(8) 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 Fe(7)Se(8) 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 Fe(7)Se(8) 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 Fe(7)Se(8) 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.