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Surface Energy of Black Phosphorus Alloys with Arsenic
ChemNanoMat ( IF 3.8 ) Pub Date : 2020-04-01 , DOI: 10.1002/cnma.202000143
Daniel Bouša 1 , Eva Otyepková 2 , Petr Lazar 2 , Michal Otyepka 2 , Zdeněk Sofer 1
Affiliation  

Black phosphorus belongs to the most intensively studied two‐dimensional materials with many unusual properties. It is capable of forming solid solutions with arsenic, which allows continual tuning of its properties. The vapour phase transport method was used for effective synthesis of black phosphorus and its alloys with arsenic of defined composition using SnI4/Sn mineralising agent. The incorporation of arsenic up to over 50 at.% was confirmed by X‐ray photoelectron spectroscopy. Structural changes were observed by X‐ray diffraction and Raman spectroscopy. Density functional theory calculations were used to calculate the change of lattice parameters due to alloying, to model Raman activity of the bP−As alloy and to estimate the surface energy of the alloy. The surface properties of black phosphorus and its alloys with arsenic were measured by inverse gas chromatography. Although the differences of surface energy between black phosphorus and its alloys were relatively low, the surface energy profiles were unusually flat, indicating a sparsity of high‐energy sites on the surface of the alloys.

中文翻译:

含砷黑磷合金的表面能

黑磷属于研究最深入的二维材料,具有许多不同寻常的性质。它能够与砷形成固溶体,从而可以不断调整其性能。气相传输法用于利用SnI 4有效合成具有限定成分的砷的黑磷及其合金/ Sn矿化剂。X射线光电子能谱证实了砷的掺入量高达50 at。%。通过X射线衍射和拉曼光谱观察结构变化。密度泛函理论计算用于计算合金化引起的晶格参数变化,对bP-As合金的拉曼活性进行建模并估算合金的表面能。用反相气相色谱法测定了黑磷及其含砷合金的表面性能。尽管黑磷及其合金之间的表面能差异相对较小,但表面能分布却异常平坦,表明合金表面上的高能位稀疏。
更新日期:2020-04-01
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