Exploring the bonding of large hydrocarbons on noble metals: Diindoperylene on Cu(111), Ag(111), and Au(111)

Exploring the bonding of large hydrocarbons on noble metals: Diindoperylene on Cu(111), Ag(111), and Au(111)
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DOI:
10.1103/physrevb.87.165443
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发表时间:
2013-04-30
期刊:
影响因子:
3.7
通讯作者:
Schreiber, F.
Schreiber, F.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Buerker, C.;Ferri, N.;Schreiber, F.

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我们提出了一种大 π 共轭有机分子在不同贵金属表面吸附的基准研究,该研究基于 X 射线驻波 (XSW) 测量和范德华 (vdW) 相互作用的密度泛函理论计算。将使用法向入射 XSW 技术测定的二茚并苝在 Cu(111)、Ag(111) 和 Au(111) 表面上的键合距离(分别为 2.51、3.01 和 3.10 埃)与计算结果进行了比较。使用具有 vdW 相互作用的 Perdew-Burke-Ernzerhof (PBE) 函数,其中包括衬底电子的集体响应(PBE + vdW(surf) 方法),与实验数据非常一致,即偏差小于 0.1 埃。值得注意的是,计算表明 vdW 对吸附能的贡献按 Au(111) < Ag(111) < Cu(111) 的顺序增加。
We present a benchmark study for the adsorption of a large pi-conjugated organic molecule on different noble metal surfaces, which is based on x-ray standing wave (XSW) measurements and density functional theory calculations with van der Waals (vdW) interactions. The bonding distances of diindenoperylene on Cu(111), Ag(111), and Au(111) surfaces (2.51, 3.01, and 3.10 angstrom, respectively) determined with the normal-incidence XSW technique are compared with calculations. Excellent agreement with the experimental data, i.e., deviations less than 0.1 angstrom, is achieved using the Perdew-Burke-Ernzerhof (PBE) functional with vdW interactions that include the collective response of substrate electrons (the PBE + vdW(surf) method). It is noteworthy that the calculations show that the vdW contribution to the adsorption energy increases in the order Au(111) < Ag(111) < Cu(111).