Note: Production of silver nanoclusters using a Matrix-Assembly Cluster Source with a solid CO2 matrix.
Note: Production of silver nanoclusters using a Matrix-Assembly Cluster Source with a solid CO2 matrix.
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注意：使用具有固体 CO2 基质的基质组装簇源生产银纳米簇。
DOI：
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发表时间：
2016
影响因子：
4.4
通讯作者：
R. Palmer
中科院分区：
文献类型：
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作者：
V. Oiko;T. Mathieu;L. Cao;J. Liu;R. Palmer
集群应用于应用领域的主要限制之一是有限的生产;因此，在保持良好的尺寸控制的同时扩大集群生产具有极大的意义。矩阵组装团簇源是一种新型的高通量团簇源，它利用离子束溅射固体稀有气体矩阵内的团簇形成。在这个过程中形成并喷射出团簇。在这里，我们报告的银团簇的生产时，稀有气体被替换为CO2的矩阵形成在20 K。尺寸分布测定从扫描透射电子显微镜分析样品与四种不同的金属负载，4%，8%，14%和23%的Ag原子的CO2分子，和两个离子束能量，1千电子伏和2千电子伏。团簇平均尺寸表现出弱依赖于金属负载，为1080个原子的前三个浓度，而离子束能量的变化导致团簇平均尺寸从86转移到160个原子。结果被解释在Ag和CO2之间的键能和稀有气体（Ar）矩阵相比。
One of the main limitations to the application of clusters on applied areas is the limited production; therefore, it is of great interest to up scale cluster production while keeping good size control. The Matrix-Assembly Cluster Source is a new high flux cluster source, which exploits cluster formation inside a solid rare gas matrix that is sputtered by an ion beam. Clusters are formed and ejected in this process. Here we report the production of Ag clusters when the rare gas is replaced by CO2 for the matrix formation at 20 K. Size distributions were determined from scanning transmission electron microscopy analysis of samples with four different metal loadings, 4%, 8%, 14%, and 23% of Ag atoms to CO2 molecules, and two ion beam energies, 1 keV and 2 keV. Cluster mean size showed weak dependence on metal loading, being ≈80 atoms for the first three concentrations, whereas the change in ion beam energy has caused cluster mean size to shift from 86 to 160 atoms. The results are interpreted in terms of bonding energy between Ag and CO2 and compared to the rare gas (Ar) matrix.