论文标题
尖端诱导的硅纳米纤维氧化
Tip-induced oxidation of silicene nano-ribbons
论文作者
论文摘要
我们报告使用扫描隧道显微镜和高分辨率光发射光谱法在AG（110）表面生长的自组装硅纳米骨的氧化。结果表明，使用分子氧对氧化具有强烈的抗性。这可以通过增加+2.6 V阈值以上的STM隧道连接处的电场来克服这一点，以诱导氧解离和反应。如预期的那样，观察到硅纳米纤维对原子氧的反应性较高。 HR-PES证实了这些观察结果：即使在分子氧的高暴露下，对应于原始硅硅的Si 2p核心水平峰仍然显性，这反映出对分子氧的反应性非常低。暴露于高剂量的原子氧后，将获得完全氧化。对应于原始硅烯的Si 2p核心峰消失。
We report on the oxidation of self-assembled silicene nanoribbons grown on the Ag(110) surface using Scanning Tunneling Microscopy and High-Resolution Photoemission Spectroscopy. The results show that silicene nanoribbons present a strong resistance towards oxidation using molecular oxygen. This can be overcome by increasing the electric field in the STM tunnel junction above a threshold of +2.6 V to induce oxygen dissociation and reaction. The higher reactivity of the silicene nanoribbons towards atomic oxygen is observed as expected. The HR-PES confirm these observations: Even at high exposures of molecular oxygen, the Si 2p core-level peaks corresponding to pristine silicene remain dominant, reflecting a very low reactivity to molecular oxygen. Complete oxidation is obtained following exposure to high doses of atomic oxygen; the Si 2p core level peak corresponding to pristine silicene disappears.
