Adsorption and switching properties of azobenzene derivatives on different noble metal surfaces: Au(111), Cu(111), and Au(100)
Adsorption and switching properties of azobenzene derivatives on different noble metal surfaces: Au(111), Cu(111), and Au(100)
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DOI：
10.1021/jp711134p
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发表时间：
2008-07-17
影响因子：
3.7
通讯作者：
Grill, Leonhard
中科院分区：
文献类型：
--
作者：
Alemani, Micol;Selvanathan, Sofia;Grill, Leonhard
采用低温扫描隧道显微镜研究了3,3',5,5'-四叔丁基偶苯（tba）在Au(111), Cu（111）和Au（100）三种不同金属基体上的吸附和开关行为。反式态是吸附后最稳定的构型，在STM图像中显示相似的外观，与底物无关。然而，自组装和开关行为高度依赖于表面的化学性质和波纹。在Au（111）表面成功地进行了尖端诱导异构化实验，并对不同的驱动机制进行了表征。实验图像与计算图像吻合较好。而Cu（111）和Au（100）的开关效应被完全抑制。
The adsorption and switching behavior of 3,3',5,5'-tetra-tert-butylazobenzene (meta-TBA) are investigated by low-temperature scanning tunneling microscopy on three different metal substrates: Au(111), Cu(111), and Au(100). The trans state is the most stable configuration after adsorption, displaying similar appearances in the STM images, independent of the substrate. However, the self-assembly and switching behavior is highly dependent on the chemistry and corrugation of the surface. On the Au(111) surface, the tip-induced isomerization is probed successfully and different driving mechanisms are characterized. The experimental images are in good agreement with calculated ones. However, the switching effect is completely suppressed on Cu(111) and Au(100).