Creating a Stable Oxide at the Surface of Black Phosphorus
Creating a Stable Oxide at the Surface of Black Phosphorus
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DOI：
10.1021/acsami.5b01297
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发表时间：
2015-07-15
影响因子：
9.5
通讯作者：
Fuhrer, M. S.
中科院分区：
文献类型：
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作者：
Edmonds, M. T.;Tadich, A.;Fuhrer, M. S.
用同步加速器光电子能谱研究了原位解理黑磷晶体在大气中暴露时表面的稳定性。在大气中暴露2天后，表面形成了稳定的以P2O5为主的亚纳米层。在形成0.4 nm厚的氧化物后，功函数从解理的黑磷的3.9 eV增加到4.0 eV，并且磷芯能级移动了0.1 eV
The stability of the surface of in situ cleaved black phosphorus crystals upon exposure to atmosphere is investigated with synchrotron-based photoelectron spectroscopy. After 2 days atmosphere exposure a stable subnanometer layer of primarily P2O5 forms at the surface. The work function increases by 0.1 eV from 3.9 eV for as-cleaved black phosphorus to 4.0 eV after formation of the 0.4 nm thick oxide, with phosphorus core levels shifting by