Synthesis of borophane polymorphs through hydrogenation of borophene

doi:10.1126/science.abg1874

GSTDTAP > 气候变化

DOI	10.1126/science.abg1874
	Synthesis of borophane polymorphs through hydrogenation of borophene
	Qiucheng Li; Venkata Surya Chaitanya Kolluru; Matthew S. Rahn; Eric Schwenker; Shaowei Li; Richard G. Hennig; Pierre Darancet; Maria K. Y. Chan; Mark C. Hersam
	2021-03-12
发表期刊	Science
出版年	2021
英文摘要	The two-dimensional material borophene, which is formed on silver surfaces, has a diverse polymorphism and is predicted to have unusual materials and electronic properties. However, it is highly unstable outside of ultrahigh vacuum conditions and oxidizes readily, which hampers exploration of its properties. Li et al. hydrogenated these materials with atomic hydrogen and showed that borophane has a lower local work function. This material is stable for days in air, and borophene can be recovered simply by thermally driving off the hydrogen. Science , this issue p. [1143][1] Synthetic two-dimensional polymorphs of boron, or borophene, have attracted attention because of their anisotropic metallicity, correlated-electron phenomena, and diverse superlattice structures. Although borophene heterostructures have been realized, ordered chemical modification of borophene has not yet been reported. Here, we synthesize “borophane” polymorphs by hydrogenating borophene with atomic hydrogen in ultrahigh vacuum. Through atomic-scale imaging, spectroscopy, and first-principles calculations, the most prevalent borophane polymorph is shown to possess a combination of two-center–two-electron boron-hydrogen and three-center–two-electron boron-hydrogen-boron bonds. Borophane polymorphs are metallic with modified local work functions and can be reversibly returned to pristine borophene through thermal desorption of hydrogen. Hydrogenation also provides chemical passivation because borophane reduces oxidation rates by more than two orders of magnitude after ambient exposure. [1]: /lookup/doi/10.1126/science.abg1874
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/318693
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Qiucheng Li,Venkata Surya Chaitanya Kolluru,Matthew S. Rahn,et al. Synthesis of borophane polymorphs through hydrogenation of borophene[J]. Science,2021.
APA	Qiucheng Li.,Venkata Surya Chaitanya Kolluru.,Matthew S. Rahn.,Eric Schwenker.,Shaowei Li.,...&Mark C. Hersam.(2021).Synthesis of borophane polymorphs through hydrogenation of borophene.Science.
MLA	Qiucheng Li,et al."Synthesis of borophane polymorphs through hydrogenation of borophene".Science (2021).