Related Experiment Video
Updated: Aug 14, 2026
13:56
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Machine Learning-Accelerated Prediction of Surface Energy in van der Waals Crystals
Shangbin Wu1, Naihua Miao1, Yu Shu1
1School of Materials Science and Engineering, Beihang University, Beijing100191, P. R. China.
The Journal of Physical Chemistry Letters
|August 13, 2026
Summary
We developed an efficient machine learning framework to predict surface energies in van der Waals (vdW) crystals. This approach offers a cost-effective, high-accuracy pathway for designing novel 2D materials.
Area of Science:
- Materials Science
- Computational Chemistry
- Condensed Matter Physics
Background:
- Surface energy is critical for the stability and properties of van der Waals (vdW) crystals.
- Accurate surface energy estimation is challenging using traditional experimental and first-principles methods.
Purpose of the Study:
- To develop an efficient and accurate computational framework for predicting surface energies in vdW crystals.
- To facilitate the design of 2D nanosheets and heterostructures through reliable surface energy predictions.
Main Methods:
- Integration of density functional theory (DFT) with machine learning (ML) models.
- Training generative adversarial networks (GANs) using structural and elemental properties.
- Prediction of surface energies for approximately 800 vdW crystals.
Main Results:
- The GAN model achieved high accuracy with R2 = 96.97% and MSE = 1.693.
- Predicted surface energies ranged from 0.67 to 42.47 meV/Å2.
- Interlayer distance, atomic volume, and periodic elemental properties significantly influence surface energy.
Conclusions:
- The developed ML framework provides a cost-effective and accurate method for predicting vdW crystal surface energies.
- This approach offers valuable theoretical insights for materials design, particularly for 2D materials.
- The study paves the way for accelerated discovery of novel 2D nanosheets and heterostructures.
Related Concept Videos
01:16Surface Tension and Surface Energy
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
01:10Van der Waals Equation
The ideal gas law is an approximation that works well at high temperatures and low pressures. The van der Waals equation of state (named after the Dutch physicist Johannes van der Waals, 1837−1923) improves it by considering two factors.
First, the attractive forces between molecules, which are stronger at higher densities and reduce the pressure, are considered by adding to the pressure a term equal to the square of the molar density multiplied by a positive coefficient a. Second, the volume...
First, the attractive forces between molecules, which are stronger at higher densities and reduce the pressure, are considered by adding to the pressure a term equal to the square of the molar density multiplied by a positive coefficient a. Second, the volume...
01:24Van 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.Polar molecules have a partial positive charge on one end and a partial negative charge on the other end of the molecule,...
01:24Surface Tension
Surface tension is defined as the force per unit length (γ) acting along the surface of a liquid. It arises due to strong intermolecular forces of attraction. A molecule located inside the bulk of the liquid is surrounded by other molecules and experiences equal forces in all directions. However, a molecule at the surface experiences unbalanced forces because there are more neighboring molecules below than above. This creates a net inward force that pulls surface molecules toward the interior,...
01:26The Van der Waals Equation
The ideal gas law is based on two simplifying assumptions: first, that there are no intermolecular attractions between gas molecules, and second, that the volume occupied by the molecules themselves is negligible compared with the volume of the container. However, these assumptions don't hold up under all conditions - specifically, at high pressures and low temperatures, as gas tends to deviate from ideal gas behavior.The van der Waals equation is an enhanced version of the ideal gas law,...
01:29Determination of Crystal Structures
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...