Electric-Field-Induced Molecular Switch of Single Dipolar Phthalocyanine on Cu(111): A Scanning Tunneling Microscopy Study

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• 作者：Tianchao Niu
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：August 27, 2015
• 年：2015
• 卷：119
• 期：34
• 页码：19802-19807
• 全文大小：517K
• ISSN：1932-7455

文摘

We demonstrate a molecular switch of a single Cl-down adsorbed choloraluminum phthalocyanine (ClAlPc) molecule on a Cu(111) substrate by scanning tunneling microscopy (STM) at liquid nitrogen temperature (77 K). The Cl-down adsorbed ClAlPc molecule exhibits an in-plane quadruple moment on the four-lobe which stems from the inequivalent charge distribution after anchoring on Cu(111). The quadruple moment under the nonuniform electric field between the STM tip and the sample surface is responsible for the rotation of these Cl-down adsorbed ClAlPc molecules within three metastable states. In response to the local nonuniform electric field, the switching of these Cl-down adsorbed ClAlPc molecules can be controlled by varying the applied biases.