کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1554322 | 1513250 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Local, global and electronic structure of supported gold nanoclusters determined by EXAFS, XRD and XPS methods
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
We analyze gold nanoclusters as supported catalysts by extended X-ray absorption fine structure, X-ray diffraction and X-ray photoelectron spectroscopy in order to determine their local, global and electronic structure. The present study points out a strong deformation of the local structure of the metal due to its interaction with oxide supports. We determine the particle size distribution and microstrain functions of the Au nanoclusters by X-ray diffraction method. Based on X-ray absorption fine structure spectroscopy analysis we show that the entire local structure of the investigated systems is strongly distorted regarding the average Au-Au coordination number. The distances between atoms are practically the same as standard Au foil. The strong metal-support interaction is confirmed by the change in shape of the electron transition probability densities that appear in the Au LIII-edge. From XPS investigations we find electronic states corresponding to gold as well as to the oxide supports.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 46, Issues 1â2, JulyâAugust 2009, Pages 141-148
Journal: Superlattices and Microstructures - Volume 46, Issues 1â2, JulyâAugust 2009, Pages 141-148
نویسندگان
Nicolae Aldea, Vasile Rednic, Stelian Pintea, Petru Marginean, Bogdan Barz, Andreea Gluhoi, Bernard E. Nieuwenhuys, Manfred Neumann, Xie Yaning, Florica Matei,