Size dependent lattice constant change of thiol self-assembled monolayer modified Au nanoclusters studied by grazing incidence x-ray diffraction
Size dependent lattice constant change of thiol self-assembled monolayer modified Au nanoclusters studied by grazing incidence x-ray diffraction
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DOI：
10.1016/j.elecom.2016.02.007
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发表时间：
2016-04-01
影响因子：
5.4
通讯作者：
Uosaki, Kohei
中科院分区：
文献类型：
--
作者：
Kondo, Toshihiro;Masuda, Takuya;Uosaki, Kohei
利用掠入射x射线衍射（GIXRD）研究了各电化学处理后在Au（111）表面组装的硫醇自组装单层（SAM）修饰金纳米团簇（GNCs）的尺寸和晶格常数。当电位在0 ~ 1.3 V （vs. Ag/AgCl）范围内扫过时，由于sam的氧化脱附作用，GNCs的尺寸和晶格常数略有减小。随着势循环数的增加，由于聚集作用，GNCs的尺寸开始增大，而由于sam从GNCs中进一步解吸，晶格常数继续减小。从GNCs中去除大部分SAMs后，其尺寸和晶格常数随电位循环数的增加而单调增加。当GNCs小于35埃时，观察到晶格常数随尺寸的变化。(C) 2016 Elsevier B.V.版权所有
Size and lattice constant of thiol self-assembledmonolayer (SAM)-modified gold nanoclusters (GNCs) assembled on Au(111) surfaces after each electrochemical treatment were investigated using grazing incidence x-ray diffraction (GIXRD). When the potential was swept between 0 and 1.3 V (vs. Ag/AgCl), the size and lattice constant of GNCs slightly decreased due to the oxidative desorption of the SAMs. As the number of potential cycles increased, the size of GNCs started to increase due to the aggregation, while the lattice constant continued to decrease due to further desorption of the SAMs from the GNCs. After most of the SAMs were removed from the GNCs, the size and lattice constant monotonically increasedwith the number of potential cycles. The size dependent lattice constant change was observed when GNCs were smaller than similar to 35 angstrom. (C) 2016 Elsevier B.V. All rights reserved.