Local Structure of Au Nanoparticles in Ionic Liquids
نویسندگان
چکیده
Introduction Sputter deposition technique provides extremely clean method to synthesize Au nanoparticles in ionic liquids without any stabilizing agents [1]. We have investigated the control factor for the size of Au nanoparticles prepared by this method. In this method, the length of alkyl chain of cation and the temperature of ionic liquids have a big role [2-4]. Especially, the temperature is important to control the size of Au nanoparticles. Consequently, we could prepare the Au nanoparticles with well-defined sizes. In this study, Au L3 XAFS measurements were carried out for the investigation of the local structure of Au nanoparticles. From the EXAFS oscillation of Au L3-edge, we extracted Au-Au bond length and coordination number. Especially, we focused on the relation between the size of nanoparticles and Au-Au bond length.
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