Monitoring and manipulating single molecule rotors on the Bi(111) surface by the scanning tunneling microscopy
Monitoring and manipulating single molecule rotors on the Bi(111) surface by the scanning tunneling microscopy
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DOI：
10.1039/c7ra05611g
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发表时间：
2017-07
期刊：
影响因子：
3.9
通讯作者：
Yubing Tu;Minlong Tao;K. Sun;Chen Ni;Fang Xie;Junzhong Wang
中科院分区：
文献类型：
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作者：
Yubing Tu;Minlong Tao;K. Sun;Chen Ni;Fang Xie;Junzhong Wang
利用低温扫描隧道显微镜（STM）研究了酞菁锰（MnPc）分子在半金属Bi（111）表面上的转动和操控。在液氦温度下，单个MnPc分子平坦地吸附在Bi（111）表面上，但朝向衬底略微弯曲。通过STM针尖的操纵，MnPc分子的面内取向可以改变60°。在液氮温度下，由于分子-半金属相互作用较弱，孤立的MnPc分子围绕中心Mn离子旋转。MnPc转子具有六瓣花状结构，对应于Bi（111）晶格的六重对称性。最重要的是，MnPc转子可以通过控制STM尖端的分子间间距来启动或停止。这些结果对于理解和控制表面安装分子转子的性能具有重要意义。
We have investigated rotation and manipulation of manganese phthalocyanine (MnPc) molecules on the semimetallic Bi(111) surface by low-temperature scanning tunneling microscopy (STM). At liquid-helium temperature, individual MnPc molecules adsorb flat on the Bi(111) surface but with a slight bend toward the substrate. The in-plane orientation of the MnPc molecule can be changed by 60° by manipulation with the STM tip. At liquid-nitrogen temperature, the isolated MnPc molecules rotate around the central Mn ion because of the weak molecule–semimetal interaction. The MnPc rotor shows a flower-like feature with six lobes corresponding to the six-fold symmetry of Bi(111) lattice. Most importantly, the MnPc rotors can be started or stopped by controlling the intermolecular spacing with the STM tip. These results are important for understanding and controlling the performance of surface-mounted molecular rotors.