Characterization by transmission electron microscopy and small-angle X-ray scattering of Au clusters formed in ionic liquids
| Autor: | Mitsuaki Takeuchi, Gikan H. Takaoka, Hiromichi Ryuto, Yusuke Matsumoto |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
Small-angle X-ray scattering Analytical chemistry Nanotechnology 02 engineering and technology Surfaces and Interfaces General Chemistry Crystal structure Cubic crystal system 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Vacuum deposition Transmission electron microscopy Ionic liquid Materials Chemistry Cluster (physics) 0210 nano-technology Dicyanamide |
| Zdroj: | Surface and Interface Analysis. 48:1148-1152 |
| ISSN: | 0142-2421 |
| DOI: | 10.1002/sia.6132 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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