Liu Yani, Liu Chen, Wang Jiaou, Gao Qian, Hu Zhenpeng, Hao Weichang, Xu Xun, Du Yi, Zhuang Jincheng
BUAA-UOW Joint Centre, School of Physics, Beihang University, Haidian District, Beijing 100091, China.
Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, Wollongong, NSW 2525, Australia.
J Phys Chem Lett. 2020 Jul 16;11(14):5584-5590. doi: 10.1021/acs.jpclett.0c01835. Epub 2020 Jul 1.
Foreign atom intercalation into an interface alters the strength of interlayer interaction and leads to the novel types of desirable properties. Here, we report an investigation via scanning tunnelling microscopy (STM) and scanning tunnelling spectroscopy (STS) of reversible potassium (K) intercalation in the blue phosphorene (blueP)-Au network that can be locally induced by an external electric field. The unique structure of the blueP-Au network provides large space in its pores for the intercalation and deintercalation process. The X-ray photoemission spectroscopy results reveal that the intercalated K atoms are bonded with Au atoms in substrate, which weakens the interaction between the blueP-Au network and Au(111). The STS and angle-resolved photoemission spectroscopy results indicate that the electronic properties of the blueP-Au network have been modulated after the K intercalation. Such reversible intercalation and deintercalation transitions in the blueP-Au network are relevant for the design of the nanoelectronic devices as well as for its application in K-ion batteries.
外来原子嵌入界面会改变层间相互作用的强度，并导致出现新型的理想特性。在此，我们报告了一项通过扫描隧道显微镜（STM）和扫描隧道谱（STS）对蓝色磷烯（blueP）-金网络中可逆钾（K）嵌入的研究，该嵌入可由外部电场局部诱导。blueP-金网络的独特结构在其孔隙中为嵌入和脱嵌过程提供了较大空间。X射线光电子能谱结果表明，嵌入的K原子与基底中的Au原子键合，这削弱了blueP-金网络与Au(111)之间的相互作用。STS和角分辨光电子能谱结果表明，K嵌入后blueP-金网络的电子特性得到了调制。blueP-金网络中的这种可逆嵌入和脱嵌转变与纳米电子器件的设计及其在钾离子电池中的应用相关。
