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Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

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Published on: August 2, 2012

Switching Molecular Kondo Effect via Supramolecular Interaction.

Qiushi Zhang¹, Guowen Kuang¹, Rui Pang²

¹Department of Physics, The Hong Kong University of Science and Technology , Hong Kong, China.

|November 17, 2015

Summary

Supramolecular assembly controls cobalt-porphyrin molecule arrangements on metal surfaces. This molecular Kondo effect switching depends on adsorption height, influenced by competing molecular and substrate interactions.

Keywords:

Anderson impurity model Kondo effect density-functional theory scanning tunneling spectroscopy supramolecular self-assembly

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Synthesis and Characterization of Supramolecular Colloids

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Area of Science:

Surface Science
Supramolecular Chemistry
Condensed Matter Physics

Background:

The Kondo effect in molecular systems is crucial for spintronics.
Controlling molecular adsorption and electronic properties on surfaces remains a challenge.

Purpose of the Study:

To investigate how supramolecular assembly influences the Kondo effect of cobalt-porphyrin molecules.
To understand the relationship between molecular configuration and electronic spin states.

Main Methods:

Utilized cryogenic scanning tunneling microscopy (STM) to image molecular arrangements.
Performed first-principles calculations for electronic structure analysis.
Applied the Anderson impurity model to compute Kondo temperatures.

Main Results:

Observed the absence or presence of the Kondo effect in different supramolecular systems.
Demonstrated that molecular adsorption height dictates Kondo effect behavior.
Identified a balance between intermolecular and molecule-substrate interactions.

Conclusions:

Supramolecular assembly offers a route to tune the Kondo effect in molecular systems.
Molecular adsorption height is a key parameter regulated by competing interactions.
Findings provide insights into designing molecular electronic devices.