Beryllene, the lightest Xene

IF 9.1 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Sumit Chahal, Arkamita Bandyopadhyay, Chan-Shan Yang, Prashant Kumar
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Abstract

After the discovery of sp2-hybridized graphene and even lighter borophene, the scientific quest for the thinnest metallic sheets prompts the discovery of beryllene. As beryllium lacks p-electrons, the hybridization and structural evolution of beryllene in determining electronic/excitonic behaviors are scientifically interesting. Herein, we report the experimental realization of freestanding flat beryllene sheets with a lateral dimension of ~0.2–4 μm via sonochemical exfoliation. High-resolution transmission electron microscopy establishes the existence of hexagonal, square and stripe crystallographic phases. While characteristic Raman fingerprints ~451 and ~614 cm−1, and experimentally observed electrically metallic nature of beryllene (vindicated by density-functional-theory band structure calculations) establish beryllene synthesis. Room temperature magnetism in Be-G and Be-CNT hybrids (established by Raman mapping and magnetic force microscopic imaging) is an interesting finding. Beryllene was explored as a surface-enhanced Raman spectroscopy (SERS) anchor in molecular sensing, oxidation-resistant, and fire-resistant laminates. It is believed that the discovery of beryllene will lead to novel functionalities and emerging applications.

Abstract Image

Abstract Image

Beryllene,最轻的Xene
在发现了sp2-杂化石墨烯和更轻的硼烯后,科学界对最薄金属薄片的追求促使人们发现了铍。由于铍缺乏对电子,铍的杂化和结构演化在决定电子/激子行为方面具有科学意义。在此,我们报告了通过声化学剥离实验实现的横向尺寸约为 0.2-4 μm 的独立扁平铍片。高分辨率透射电子显微镜确定了六边形、方形和条纹晶体相的存在。特征拉曼指纹 ~451 和 ~614 cm-1,以及实验观察到的铍的电金属性(通过密度函数理论带结构计算得到证实)确定了铍的合成。Be-G 和 Be-CNT 混合物的室温磁性(通过拉曼图谱和磁力显微镜成像确定)是一个有趣的发现。在分子传感、抗氧化和防火层压板中,铍被探索用作表面增强拉曼光谱(SERS)锚。相信铍的发现将带来新的功能和新兴应用。
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来源期刊
npj 2D Materials and Applications
npj 2D Materials and Applications Engineering-Mechanics of Materials
CiteScore
14.50
自引率
2.10%
发文量
80
审稿时长
15 weeks
期刊介绍: npj 2D Materials and Applications publishes papers on the fundamental behavior, synthesis, properties and applications of existing and emerging 2D materials. By selecting papers with the potential for impact, the journal aims to facilitate the transfer of the research of 2D materials into wide-ranging applications.
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