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Updated: Jun 22, 2026

Fabricating Nanogaps by Nanoskiving

Fabricating Nanogaps by Nanoskiving

Published on: May 13, 2013

Self-assembled nanogaps for molecular electronics.

Qingxin Tang¹, Yanhong Tong, Titoo Jain

¹Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, Denmark.

|May 27, 2009

Summary

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Researchers created molecular devices using self-assembly, forming a nanogap with precise length control. This method enables the fabrication of novel molecular electronic devices.

Area of Science:

Materials Science
Nanotechnology
Molecular Electronics

Background:

Fabricating nanoscale gaps is crucial for molecular electronic devices.
Controlling gap dimensions at the molecular level presents significant challenges.

Purpose of the Study:

To develop a solution-based self-assembly method for creating nanogaps in molecular devices.
To demonstrate the feasibility of using rigid molecules to define nanogap length.

Main Methods:

Utilized thiol end-capped oligo(phenylenevinylene)s (OPVs) for self-assembly.
Assembled gold nanorods onto gold nanoparticle-coated tin dioxide (SnO2:Sb) nanowires.
Employed atomic force microscopy (AFM) for electrical measurements.

Main Results:

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Successfully created molecular nanogaps with lengths determined by the rigid OPV molecules.
Demonstrated that gold nanorods and nanoparticles minimize screening effects due to their small dimensions.
Confirmed the conductivity pathway from the molecular device to the external circuit via SnO2:Sb nanowires.

Conclusions:

Solution-based self-assembly is a viable technique for fabricating nanogaps for molecular devices.
The molecular length directly dictates the nanogap size, offering precise control.
This approach facilitates the construction of functional molecular electronic components.