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Updated: Dec 29, 2025

Scalable Nanohelices for Predictive Studies and Enhanced 3D Visualization

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Published on: November 12, 2014

Atomically Precise PdSe₂ Pentagonal Nanoribbons.

Giang D Nguyen^1,2, Akinola D Oyedele^1,3, Amanda Haglund^3,4

¹Center for Nanophase Materials Sciences , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States.

|February 6, 2020

Summary

This summary is machine-generated.

Atomically precise pentagonal palladium diselenide nanoribbons (PNRs) exhibit metallic behavior and ballistic transport. These air-stable PNRs offer tunable electronic properties for advanced material applications.

Keywords:

FET device Raman spectroscopy ballistic transport first-principles calculations nanoribbons scanning tunneling microscopy transition metal dichalcogenides

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Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Two-dimensional materials like palladium diselenide (PdSe2) offer unique electronic properties.
Precise control over nanostructure dimensions is crucial for tailoring material functionality.

Purpose of the Study:

To fabricate and characterize atomically precise pentagonal palladium diselenide nanoribbons (PNRs).
To investigate the electronic transport properties and structural characteristics of these PNRs.

Main Methods:

Hybrid fabrication combining top-down and bottom-up approaches.
In situ four-probe scanning tunneling microscopy (STM) for transport measurements.
Density functional theory (DFT) calculations for electronic structure analysis.
Raman spectroscopy and field-effect transistor (FET) measurements for corroboration.

Main Results:

Uniform array of pentagonal PdSe2 nanoribbons (PNRs) with 2.4 nm width and >200 nm length.
PNRs exhibit metallic behavior and ballistic transport over at least 20 nm.
DFT predicts semiconducting isolated PNRs, but band gap closure upon coupling or substrate interaction.
Experimental data confirms PNR coupling and influences electronic properties.

Conclusions:

Atomically precise PNRs can be fabricated using a facile hybrid method.
Coupling effects significantly alter the electronic properties of PNRs, leading to metallic behavior.
These air-stable PNRs represent a promising functional material with controlled dimensions for electronic applications.