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Plasmid-derived DNA Strand Displacement Gates for Implementing Chemical Reaction Networks
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Bidirectional Phase Transformation of Supramolecular Networks Using Two Molecular Signals.

Daling Cui1,2, Cheng-Hao Liu1, Federico Rosei2

  • 1Department of Chemistry, McGill University 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada.

ACS Nano
|January 11, 2022
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate reversible control of molecular self-assembly using terthienobenzenetricarboxylic acid (TTBTA) networks. Different molecules trigger transitions between porous and dense phases, advancing nanotechnology applications.

Keywords:
bilayer heterostructuremolecular self-assemblymolecular signalingreversible phase controlscanning tunneling microscopy

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Reversible control of molecular self-assembly is crucial for adaptive biological systems but challenging in artificial systems.
  • Developing switchable supramolecular nanostructures is key for advanced nanotechnology.

Purpose of the Study:

  • To investigate the reversible structural transition of a 2D supramolecular network.
  • To demonstrate control over molecular self-assembly using external molecular signals.

Main Methods:

  • Scanning tunneling microscopy (STM) was employed to visualize the supramolecular structures.
  • Density functional theory (DFT) calculations were used to understand the underlying interactions.

Main Results:

  • A 2D network of terthienobenzenetricarboxylic acid (TTBTA) showed reversible phase transitions between porous and dense states.
  • Trimethyltripyrazolotriazine (TMTPT) induced a transition to the dense phase.
  • C60 molecules triggered a reverse transition back to the porous phase.

Conclusions:

  • Selective molecular interactions enable reversible control over supramolecular network structures.
  • This work represents significant progress in controlling nanostructures and offers potential for phase control, molecular sensing, and smart surfaces.