Peeling by Nanomechanical Forces: A Route to Selective Creation of Surface Structures.
Peeling by Nanomechanical Forces: A Route to Selective Creation of Surface Structures.
复制标题
纳米机械力剥离：选择性创建表面结构的途径
DOI：
10.1103/physrevlett.115.036102
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发表时间：
2015
影响因子：
8.6
通讯作者：
D. Marx
中科院分区：
文献类型：
--
作者：
P. Seema;J. Behler;D. Marx
一个新兴的路线，纳米结构的混合有机金属界面定制的性能是他们的操纵由STM和AFM尖端施加的纳米机械力。然而，尽管实验取得了令人印象深刻的进展，但人们对这种纳米机械技术的基本原子机制几乎一无所知，因此阻碍了预测性的理性方法。在这里，我们确定“表面剥离”作为一个重要的新机制的表面改性。使用密度泛函计算的硫醇盐自组装单分子膜在金和银，我们发现，这种现象是非常敏感的力矢量，导致在系统的响应，可用于选择性地创建新的混合表面的高各向异性。
An emerging route to nanostructured hybrid organic-metal interfaces with tailored properties is their manipulation by nanomechanical forces as exerted by STM and AFM tips. Yet, despite impressive experimental progress, close to nothing is known about the underlying atomistic mechanisms of such nanomechanical techniques, thus hindering predictive, rational approaches. Here, we identify “surface peeling” as an important new mechanism for the modification of surfaces. Using density-functional calculations of thiolate self-assembled monolayers at gold and silver, we find that this phenomenon is very sensitive to the force vector, resulting in a high anisotropy in the systems’ response that can be exploited for the selective creation of novel hybrid surfaces.