硼酚
硼
单层
扫描隧道显微镜
化学物理
材料科学
离域电子
纳米技术
结晶学
表征(材料科学)
吸附
化学
物理化学
有机化学
作者
Haifeng Lv,Caiyun Chen,Wenbin Li,Zhiwen Zhuo,Peng Cheng,Yi‐Qi Zhang,Baojie Feng,Kehui Wu,Xiaojun Wu,Lan Chen
标识
DOI:10.1073/pnas.2215131120
摘要
The synthesis and characterization of small boron clusters with unique size and regular arrangement are crucial for boron chemistry and two-dimensional borophene materials. In this study, together with theoretical calculations, the joint molecular beam epitaxy and scanning tunneling microscopy experiments achieve the formation of unique B 5 clusters on monolayer borophene (MLB) on a Cu(111) surface. The B 5 clusters tend to selectively bind to specific sites of MLB with covalent boron–boron bonds in the periodic arrangement, which can be ascribed to the charge distribution and electron delocalization character of MLB and also prohibits nearby co-adsorption of B 5 clusters. Furthermore, the close-packed adsorption of B 5 clusters would facilitate the synthesis of bilayer borophene, exhibiting domino effect-like growth mode. The successful growth and characterization of uniform boron clusters on a surface enrich the boron-based nanomaterials and reveal the essential role of small clusters during the growth of borophene.
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