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Adlayer structure of TCNQ molecules on Cu(111): Anin situ STM study

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Abstract

In situ electrochemical scanning tunneling microscopy (STM) was employed to examine tetracyanoquinodimethane (TCNQ) layer adsorbed on Cu(111) electrode surface in 0.1 mol/L HClO4 solution. The TCNQ molecules are found to form highly-ordered long range adlayer with a (4 × 4) symmetry. Each TCNQ molecule is adsorbed on Cu(111) surface in flat-lying orientation. The molecules are preferentially aligned with their long axes in the [1¯21 ] direction. A structural model is proposed for the adlayer.

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Correspondence to Lijun Wan.

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Wan, L., Kingo, I. Adlayer structure of TCNQ molecules on Cu(111): Anin situ STM study. Chin.Sci.Bull. 46, 377–379 (2001). https://doi.org/10.1007/BF03183267

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Keywords

  • TCNQ molecule
  • electrochemical scanning tunneling microscopy
  • Cu(111)
  • adlayer structure