论文标题
来自二元金属合金的独立2D金属
Free-standing 2D metals from binary metal alloys
论文作者
论文摘要
最近的实验证明了通过将Au-Ag合金暴露于电子束照射的合金来形成独立的AU单层。受到这一发现的启发，我们使用了半经验有效的培养基理论模拟来研究30种不同的二进制金属合金中的单层形成，由晚期D系列金属Ni，Cu，Cu，Pd，Pd，Ag，Pt和Au组成。在与实验的定性一致性中，我们发现从Au-Ag合金上处理Ag Ag原子所需的光束能量小于破坏交易的Au单层所需的能量。我们的模拟表明，也可以使用类似的方法来形成来自PT-CU，PT-NI和PT-PD合金的Au-Cu合金和PT单层的AU单层。
Recent experiment demonstrated the formation of free-standing Au monolayers by exposing Au-Ag alloy to electron beam irradiation. Inspired by this discovery, we used semi-empirical effective medium theory simulations to investigate monolayer formation in 30 different binary metal alloys composed of late d-series metals Ni, Cu, Pd, Ag, Pt, and Au. In qualitative agreement with the experiment, we find that the beam energy required to dealloy Ag atoms from Au-Ag alloy is smaller than the energy required to break the dealloyed Au monolayer. Our simulations suggest that similar method could also be used to form Au monolayers from Au-Cu alloy and Pt monolayers from Pt-Cu, Pt-Ni, and Pt-Pd alloys.
