Characterization by transmission electron microscopy and small-angle X-ray scattering of Au clusters formed in ionic liquids
Characterization by transmission electron microscopy and small-angle X-ray scattering of Au clusters formed in ionic liquids
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通过透射电子显微镜和小角 X 射线散射对离子液体中形成的金簇进行表征
DOI：
10.1002/sia.6132
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发表时间：
2016
影响因子：
1.7
通讯作者：
H. Ryuto
中科院分区：
文献类型：
--
作者：
G. H. Takaoka;Y. Matsumoto;M. Takeuchi;H. Ryuto
将Au蒸气沉积在离子液体如1-乙基-3-甲基-咪唑鎓二氰胺（Bmim-DCA）和1-丁基-3-甲基-咪唑鎓双（三氟亚磺酰基）酰亚胺（Bmim-TFSI）的表面上。通过调节沉积速率在离子液体中形成Au团簇。透射电子显微镜测量表明，在Al 2 O3-DCA中形成的大的Au团簇具有面心立方晶体结构，而小的Au团簇具有十面体结构。此外，小角X射线散射测量表明，Au团簇的平均直径在1 ~ 6 nm之间，团簇尺寸随着沉积速率的增加而减小。在Bmim-TFSI中形成的Au团簇的平均直径在0.5至4.5 nm的范围内，这小于在Bmim-DCA中形成的Au团簇的平均直径，并且大部分晶体结构为十面体。版权所有© 2016约翰威利父子有限公司.
Au vapor was deposited on the surface of ionic liquids such as 1‐ethyl‐3‐methyl‐imidazolium dicyanamide (Emim‐DCA) and 1‐buthyl‐3‐methyl‐imidazolium bis(trifluorosulpheniy)imide (Bmim‐TFSI). Au clusters were formed in the ionic liquid by adjusting the deposition rate. Transmission electron microscope measurements showed that the large Au clusters formed in Emim‐DCA had a face‐centered cubic crystal structure, while the small Au clusters had a decahedral structure. Furthermore, small‐angle X‐ray scattering measurements showed that the average diameter of Au clusters was in the range of 1 to 6 nm, and the cluster size decreased with increasing deposition rate. The average diameter of Au clusters formed in Bmim‐TFSI was in the range of 0.5 to 4.5 nm, which is smaller than that of Au clusters in Emim‐DCA, and most of the crystal structures were decahedrons. Copyright © 2016 John Wiley & Sons, Ltd.