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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Synthesis and Characterization of Supramolecular Colloids
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Engineering novel surface electronic states via complex supramolecular tessellations.

Wenqi Hu1,2, Mohammad A Kher-Elden3, Hexu Zhang1,2

  • 1Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. yiqi.zhang@iphy.ac.cn.

Nanoscale
|April 26, 2022
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Summary

Researchers tailored surface-state (SS) electrons using supramolecular networks and quantum dot (QD) coupling. This novel approach enables the creation of unique 2D electronic structures, offering versatile control over surface electronic properties.

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Area of Science:

  • Surface Science
  • Materials Chemistry
  • Condensed Matter Physics

Background:

  • Tailoring surface electronic properties is crucial for advanced electronic devices.
  • Supramolecular self-assembly offers a route to engineer nanoscale structures.
  • Controlling Shockley surface-state (SS) electrons requires precise interfacial design.

Purpose of the Study:

  • To explore the tailoring of SS electrons using complex interfacial supramolecular tessellations.
  • To investigate novel 2D electronic structures via quantum dot (QD) coupling.
  • To demonstrate a versatile route for controlling surface electronic landscapes.

Main Methods:

  • Low-temperature scanning tunnelling microscopy and spectroscopy (LT-STM/STS).
  • Computational modelling using electron plane wave expansion (EPWE) and empirical tight-binding (TB) methods.
  • Gas-mediated on-surface synthesis of organometallic networks.

Main Results:

  • Selective synthesis of three distinct open porous networks with Archimedean tilings.
  • Demonstration of intricate quantum dot (QD) coupling scenarios.
  • Realization of novel 2D electronic structures, including Kagome- and Dirac-type bands, via QD coupling.

Conclusions:

  • QD coupling provides a versatile complementary route for controlling surface electronic landscapes.
  • Supramolecular tessellations enable the design of novel 2D electronic structures.
  • This approach offers significant potential for future electronic applications.