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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Ji, Min Yao, Yong-xin Gong, Xin-gao Chen, Guo-hong Gu, Xiao |
| Copyright Year | 2012 |
| Abstract | Based on density-functional calculation and genetic algorithm structure search, we propose a series of 16-coordinate core–shell clusters: M@Li16(M = Ca, Sr, Ba, Ti, Zr, Hf). A tetrahedral (Td) structure with an outer shell of 16 lithium atoms and one enclosed heavy atom is found to be the global minimum in the structural exploration of BaLi16 based on genetic algorithm. This structure also has lower energy compared to the other isomers we employed in all the MLi16 clusters. In this structure, the atoms are bonded together by metallic bonds with alkali (IA) and alkaline-earth (IIA) metal atoms. Their corresponding first electronic shells are closed with significant energy gaps because their total numbers of valence electrons fulfil the 18-electron rule. Such a combination could be extended to 20-electron systems by enclosing IVB elements. With simple valence electrons and highly symmetric structures, superatomic molecular orbitals are identified in all of the Td clusters. |
| Starting Page | 2567 |
| Ending Page | 2570 |
| Page Count | 4 |
| File Format | HTM / HTML PDF |
| ISSN | 20403364 |
| Volume Number | 4 |
| Issue Number | 8 |
| Journal | Nanoscale |
| DOI | 10.1039/c2nr00056c |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | 18-electron rule Zirconium Genetic algorithm Lithium Alkali metal Ba |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology |
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