Electron transport through negatively curved nanographenes

Area of Science:

• Materials Science
• Condensed Matter Physics
• Organic Chemistry

Background:

• Graphene's unique properties are sensitive to structural imperfections.
• Bottom-up synthesis allows controlled defect incorporation in nanographenes.
• The effect of curvature-inducing defects on electron transport is largely unexplored.

Purpose of the Study:

• Investigate electron transport through saddle-shaped nanographenes.
• Understand the impact of edge-induced curvature on conductance.
• Explore structure-property correlations for processable carbon nanostructures.

Main Methods:

• Experimental electron transport measurements.
• Theoretical calculations (e.g., DFT).
• Synthesis of nanographenes with specific defects (tropone rings).

Main Results:

• Saddle-shaped nanographenes with tropone rings exhibit no significant change in single-molecule or monolayer conductance.
• Curvature introduced by tropone rings significantly enhances solubility and processability.
• Defect-free analogues show lower solubility and processability.

Conclusions:

• Edge-induced out-of-plane distortion in nanographenes does not impede electron transport.
• Tropone-based curvature offers a route to more processable graphene-like materials.
• These findings contribute to the development of carbon-based electronic devices.