Formation of Core–Shell Ethane–Silver Clusters in He Droplets
Formation of Core–Shell Ethane–Silver Clusters in He Droplets
复制标题
氦液滴中核心-壳层乙烷-银团簇的形成
DOI：
10.1021/acs.jpca.7b05136
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Vilesov, Andrey F.
中科院分区：
文献类型：
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作者：
Loginov, Evgeny;Gomez, Luis F.;Sartakov, Boris G.;Vilesov, Andrey F.
由数千个粒子组成的乙烷核银壳团簇在捕获乙烷分子后被Ag原子聚集在氦滴中。利用红外激光光谱在乙烷的C-H伸缩振动范围内研究了复合团簇。光谱显示了振动带的分裂，这归因于与Ag的相互作用。对捕获的不同数量的乙烷分子和银原子的能带强度的严格分析表明，复合簇由乙烷核心组成，该核心被相对较小的银簇覆盖。这种亚稳结构是由于团簇的内聚能在超流氦滴中快速耗散而稳定下来的。
Ethane core–silver shell clusters consisting of several thousand particles have been assembled in helium droplets upon capture of ethane molecules followed by Ag atoms. The composite clusters were studied via infrared laser spectroscopy in the range of the C–H stretching vibrations of ethane. The spectra reveal a splitting of the vibrational bands, which is ascribed to interaction with Ag. A rigorous analysis of band intensities for a varying number of trapped ethane molecules and Ag atoms indicates that the composite clusters consist of a core of ethane that is covered by relatively small Ag clusters. This metastable structure is stabilized due to fast dissipation in superfluid helium droplets of the cohesion energy of the clusters.