Physisorption-Induced Surface Reconstruction and Morphology Changes: Adsorption of Glycine on the Au(110) 1 × 2 Surface
Physisorption-Induced Surface Reconstruction and Morphology Changes: Adsorption of Glycine on the Au(110) 1 × 2 Surface
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DOI：
10.1021/la011390l
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发表时间：
2002-04
期刊：
影响因子：
3.9
通讯作者：
Xueying Zhao;Hao Yan;R. Zhao;W. Yang
中科院分区：
文献类型：
--
作者：
Xueying Zhao;Hao Yan;R. Zhao;W. Yang
虽然众所周知，化学吸附可能会改变金属表面的重构，甚至改变表面的形态，但人们不会期望看到物理吸附引起的类似效果。然而，在本文中，我们准确地报道了甘氨酸在Au(110)1×2表面的物理吸附所引起的这种效应。具体地说，在低覆盖率下，吸附剂可以将重建的1×2表面改变为有序的1×3，而进一步的吸附甚至可以显著地改变表面形态，直到变得完全刻面。作为副产物，发现了清洁Au(110)的两个新的重构态，即1×1和1×3，前者在室温以下是亚稳的，后者在不超过170℃的高温下是亚稳的。文中还讨论了两者之间快速、可逆室温局域跃迁及其可能的机制。
Although it is well-known that chemisorption may change the reconstruction or even the morphology of metal surfaces, one would not expect to see similar effects induced by physisorption. In this paper, we report, however, exactly such effects induced by physisorption of glycine on the Au(110) 1 × 2 surface. Specifically, at low coverage the adsorbates can change the 1 × 2 reconstructed surface to a well-ordered 1 × 3, whereas further adsorption can even dramatically modify the surface morphology until becoming completely faceted. As byproducts, two new reconstructions of clean Au(110), i.e., 1 × 1 and 1 × 3, have been found, with the former being metastable at or below room temperature while the latter at higher temperatures not beyond 170 °C. The fast and reversible room-temperature local transition between the two along with its possible mechanism will also be discussed.