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Van der Waals Interactions

Van der Waals Interactions

Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.

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Related Experiment Video

Updated: Jan 11, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

Narrow-Diameter Tubular One-Dimensional van der Waals Heterostructures.

Elzbieta Pach¹, Magdalena Kierkowicz², Mert Kurttepeli³

¹Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, Barcelona, 08193, Spain.

Small (Weinheim an Der Bergstrasse, Germany)

|November 11, 2025

Summary

This summary is machine-generated.

Researchers created ultra-narrow 1D van der Waals heterostructures using template-assisted growth. These novel nanotube structures exhibit unique electronic and optical properties, potentially benefiting photovoltaic applications.

Keywords:

1D van der Waals heterostructure confinement curved 2D materials encapsulation filled carbon nanotubes inorganic nanotubes metal halide strain

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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

Related Experiment Videos

Last Updated: Jan 11, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

Area of Science:

Materials Science
Nanotechnology
Condensed Matter Physics

Background:

2D materials can be rolled into 1D nanotubes, merging properties of both dimensions.
Combining different layers into 1D van der Waals heterostructures offers expanded applications.

Purpose of the Study:

To synthesize and characterize narrow 1D van der Waals heterostructures with diameters around 1 nm.
To investigate the role of halides in forming these structures.
To explore the electronic and optical properties of the resulting metal halide nanotubes.

Main Methods:

Template-assisted growth of lutetium halide (LuX3) nanotubes within single-walled carbon nanotubes.
Aberration-corrected electron microscopy and image simulation for structural analysis.
Synchrotron radiation for crystal structure determination.
Density functional theory (DFT) calculations for electronic/optical property analysis.

Main Results:

Successfully synthesized highly crystalline, single-layer lutetium halide nanotubes with internal diameters as low as ~1 nm.
Identified the crucial role of the halide (Cl, Br, I) in heterostructure formation.
Revealed a strong correlation between nanotube chirality and their electronic/optical characteristics.
Observed spatial separation of band-edge states, beneficial for charge separation.

Conclusions:

Demonstrated a method for creating ultra-narrow 1D van der Waals heterostructures.
Highlighted the tunability of electronic and optical properties through material choice and chirality.
Suggested potential applications in photovoltaics due to facilitated electron-hole pair separation.