arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2303.06804cond-mat.mtrl-sci
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二维氧化物纳米片的表面台阶诱导弯曲

Surface step induced bending in two-dimensional oxide nanosheet

Jiake Wei, Masato Yoshiya, Feng Bin, Naoya Shibata, Yuichi Ikuhara

摘要:

表面台阶在表面主导过程和相关性质中起着重要作用,对于低维纳米或量子材料,由于表面原子的比例大大增加,这些作用将显著增强。然而,在纳米/量子系统中的表面台阶的原子结构知之甚少,因为它是非常困难的可控地引入这些缺陷的实验。本文利用聚焦亚埃高能电子束在扫描透射电子显微镜中诱导原子精确刻蚀,制备了薄至2个原子层的MgO二维(100)纳米片,并在纳米片中可控地引入了表面台阶。研究发现,表面台阶可以弯曲的MgO纳米片,这种台阶诱导的弯曲变得更加明显的纳米片与层数较少。我们发现,弯曲的纳米片是起源于阶跃诱导的阶跃力和减少弯曲刚度的纳米片系统。

英文摘要:

The surface steps play dramatic roles in surface dominated processes and the related properties, in which these roles would be significantly enhanced for the low-dimensional nano or quantum materials since the ratio of surface atoms is largely increased. However, the atomic structures of surface steps in the nano/quantum systems are poorly understood because it is extremely difficult to controllably introduce these defects experimentally. Here, by utilizing the focused sub-Angstrom high energy electron beam induced atomic precise etching in a scanning transmission electron microscope, we fabricate MgO two-dimensional (100) nanosheet as thin as 2 atomic layers, and controllably introduced the surface steps in the nanosheet. It is found that the surface steps could bend the MgO nanosheet and such step-induced bending becomes more pronounced for the nanosheet with less layer numbers. We reveal that the bending of the nanosheets is originated from the step induced step force and the reduced bending stiffness in the nanosheet system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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