One of the essential components of molecular electronic circuits are switching elements that are stable in two different states and can ideally be switched on and off many times. Here, distinct buckminsterfullerenes within a self-assembled monolayer, forming a two-dimensional dodecagonal quasicrystal on a Pt-terminated Pt3Ti(111) surface, are identified to form well separated molecular rotational switching elements. Employing scanning tunneling microscopy, the molecular-orbital appearance of the fullerenes in the quasicrystalline monolayer is resolved. Thus, fullerenes adsorbed on the 36vertex configuration are identified to exhibit a distinctly increased mobility. In addition, this finding is verified by differential conductance measurements. The rotation of these mobile fullerenes can be triggered frequently by applied voltage pulses, while keeping the neighboring molecules immobile. An extensive analysis reveals that crystallographic and energetic constraints at the molecule/metal interface induce an inequality of the local potentials for the 36and 32.4.3.4 vertex sites and this accounts for the switching ability of fullerenes on the 36vertex sites. Consequently, a local area of the 8/3 approximant in the two-dimensional fullerene quasicrystal consists of single rotational switching fullerenes embedded in a matrix of inert molecules. Furthermore, it is deduced that optimization of the intermolecular interactions between neighboring fullerenes hinders the realization of translational periodicity in the fullerene monolayer on the Pt-terminated Pt3Ti(111) surface.

中文翻译：

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二维富勒烯准晶中的旋转开关

分子电子电路的基本组件之一是开关元件，它们在两种不同的状态下保持稳定，并且可以理想地多次打开和关闭。在这里，自组装单层内的不同巴克明斯特富勒烯，在 Pt 封端的 Pt 上形成二维十二角形准晶体3Ti(111) 表面被鉴定为形成良好分离的分子旋转开关元件。采用扫描隧道显微镜，解析了准晶单层中富勒烯的分子轨道外观。因此，富勒烯吸附在 36顶点配置被确定为表现出明显增加的移动性。此外，这一发现还通过微分电导测量得到了验证。这些移动富勒烯的旋转可以通过施加的电压脉冲频繁触发，同时保持相邻分子不动。广泛的分析表明，分子/金属界面处的晶体学和能量约束导致 3 的局部势不相等。6和 32.4.3.4 顶点位点，这说明了富勒烯在 3 上的切换能力6顶点站点。因此，二维富勒烯准晶体中 8/3 近似的局部区域由嵌入惰性分子基质中的单旋转切换富勒烯组成。此外，据推测，相邻富勒烯之间分子间相互作用的优化阻碍了 Pt 封端的 Pt 上富勒烯单层中平移周期性的实现。3Ti(111)表面。