Sodium-Induced Reordering of Atomic Stacks in Black Phosphorus

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• 作者：Yingchun ChengYihan Zhu ; Yu Han ; Zhongyuan Liu ; Bingchao Yang ; Anmin Nie ; Wei HuangReza Shahbazian-Yassar ; Farzad Mashayek
• 刊名：Chemistry of Materials
• 出版年：2017
• 出版时间：February 14, 2017
• 年：2017
• 卷：29
• 期：3
• 页码：1350-1356
• 全文大小：655K
• ISSN：1520-5002

文摘

While theoretical simulations predict contradictory results about how the intercalation of foreign metal atoms affects the order of atomic layers in black phosphorus (BP), no direct experimental visualization work has yet clarified this ambiguity. By in situ electrochemical sodiation of BP inside a high-resolution transmission electron microscope and first-principles calculations, we found that sodium intercalation induces a relative glide of ¹/₂ ⟨010⟩ {001}, resulting in reordering of atomic stacks from AB to AC in BP. The observed local amorphization in our experiments is triggered by lattice constraints. We predict that intercalation of sodium or other metal atoms introduces n-type carriers in BP. This potentially opens a new field for two-dimensional electronics based on BP.