Raising flags: Applications of chemical marker groups to study self- assembly, chirality, and orientation of interfacial films by scanning tunneling

  • Giancarlo L
  • Flynn G
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Abstract

When used in conjunction with "chemical marker groups" (functionalities such as -Br and -COOH), scanning tunneling microscopy is a powerful tool for studying the properties of liquid-solid interfaces. Chemical markers serve as "flags" for the identification of interfacial structures, allowing, for example, the absolute chirality of optically active molecules self-assembling on a graphite surface to be determined. Subtle changes in the orientation of these chemical functionalities that affect the long-range order of interfacial films have also been observed and explored. Finally, alterations in self-assembly resulting from variations in adsorbate or substrate structure can be deduced by taking advantage of these STM "flags".

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Authors

  • Leanna C. Giancarlo

  • George W. Flynn

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