Synthesis of borophenes: Anisotropic, two-dimensional boron polymorphs.
نویسندگان
چکیده
At the atomic-cluster scale, pure boron is markedly similar to carbon, forming simple planar molecules and cage-like fullerenes. Theoretical studies predict that two-dimensional (2D) boron sheets will adopt an atomic configuration similar to that of boron atomic clusters. We synthesized atomically thin, crystalline 2D boron sheets (i.e., borophene) on silver surfaces under ultrahigh-vacuum conditions. Atomic-scale characterization, supported by theoretical calculations, revealed structures reminiscent of fused boron clusters with multiple scales of anisotropic, out-of-plane buckling. Unlike bulk boron allotropes, borophene shows metallic characteristics that are consistent with predictions of a highly anisotropic, 2D metal.
منابع مشابه
Wettability of boron monolayer using molecular dynamics simulation method
Over the past years, two-dimensional materials such as graphene, phosphorene, silicene, and boron-nitride have attracted the attention of many researchers. After the successful synthesis of graphene, due to its many new applications, researches began to produce nanosheets from other elements, and among these elements, boron was one of the options. In the periodic table of elements, boron is ahe...
متن کاملCompetition between drum and quasi-planar structures in RhB18-: motifs for metallo-boronanotubes and metallo-borophenes.
Metal-doped boron clusters provide new opportunities to design nanoclusters with interesting structures and bonding. A cobalt-doped boron cluster, CoB18-, has been observed recently to be planar and can be viewed as a motif for metallo-borophenes, whereas the D9d drum isomer as a motif for metallo-boronanotubes is found to be much higher in energy. Hence, whether larger doped boron drums are po...
متن کاملB27(-): Appearance of the smallest planar boron cluster containing a hexagonal vacancy.
Photoelectron spectroscopy and ab initio calculations have been carried out to probe the structures and chemical bonding of the B27 (-) cluster. Comparison between the experimental spectrum and the theoretical results reveals a two-dimensional (2D) global minimum with a triangular lattice containing a tetragonal defect (I) and two low-lying 2D isomers (II and III), each with a hexagonal vacancy...
متن کاملProperties, Application and Synthesis Methods of boron nitride Powder: A Review
h-BN is a multipurpose ceramic material, with exceptional properties and a wide area of application in industry. It is structurally similar to graphite and it resists oxidation to higher temperatures than graphite. It is used in powder form as a mold release agent in metal casting, as a high temperature lubricant or even in cosmetics. hBN can be shaped by hot-pressing and is used as molds or cr...
متن کاملAn Update from Flatland.
For more than a decade after the discovery of the unique physical properties of graphene, two-dimensional (2D) materials have been attracting the attention of the nanoscale research community and beyond. This continuing interest is fueled by frequent reports of the discovery of new 2D materials, with silicene, germanene, and phosphorene already being intensely researched. More than 20 carbides ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Science
دوره 350 6267 شماره
صفحات -
تاریخ انتشار 2015