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Related Concept Videos

Van der Waals Equation01:10

Van der Waals Equation

4.9K
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...
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VSEPR Theory and the Basic Shapes02:52

VSEPR Theory and the Basic Shapes

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Overview of VSEPR Theory
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VSEPR Theory and the Effect of Lone Pairs04:01

VSEPR Theory and the Effect of Lone Pairs

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Effect of Lone Pairs of Electrons on Molecule Geometry
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Van der Waals Interactions01:24

Van der Waals Interactions

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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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VSEPR Theory02:37

VSEPR Theory

12.2K
Valence shell electron-pair repulsion theory (VSEPR theory) enables us to predict the molecular structure around a central atom from an examination of the number of bonds and lone electron pairs in its Lewis structure. The VSEPR model assumes that electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between these electron pairs by maximizing the distance between them. The electrons in the valence shell of a central atom form either bonding...
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Predicting Molecular Geometry02:27

Predicting Molecular Geometry

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VSEPR Theory for Determination of Electron Pair Geometries
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Related Experiment Video

Updated: Nov 1, 2025

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

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Recent progress in Van der Waals 2D PtSe2.

Banglin Cao1, Zimeng Ye1, Lei Yang1

  • 1College of Materials Science and Engineering, Sichuan University, Chengdu-610065, People's Republic of China.

Nanotechnology
|June 22, 2021
PubMed
Summary
This summary is machine-generated.

Platinum diselenium (PtSe2) is a promising 2D material with excellent properties for electronic devices. This review covers its synthesis, properties, and applications, highlighting challenges and future directions for PtSe2 research.

Keywords:
PtSe2electronic structuresynthesisthickness-dependent propertytwo-dimensional transition metal dichalcogenides

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Platinum diselenium (PtSe2) is an emerging 2D material within the transition metal dichalcogenides (TMDCs) family.
  • PtSe2 exhibits unique properties including a layer-dependent band gap, high carrier mobility, and broadband photoresponse.
  • Its chemical inertness in ambient conditions offers potential for high-performance and stable nano-devices.

Purpose of the Study:

  • To systematically review the current state of research on 2D PtSe2.
  • To summarize its structure, properties, synthesis methods, and potential device applications.
  • To identify challenges and outline future perspectives for 2D PtSe2.

Main Methods:

  • Literature review of scientific publications on PtSe2.
  • Analysis of synthesis techniques for 2D PtSe2.
  • Evaluation of experimental and theoretical studies on PtSe2 properties and applications.

Main Results:

  • 2D PtSe2 demonstrates significant promise for applications in room-temperature and broadband photodetectors, as well as transistors.
  • The material's synthesis and device applications are still in the early stages of development.
  • PtSe2 offers advantages over other TMDCs due to its ambient stability.

Conclusions:

  • 2D PtSe2 is a highly promising material with unique properties suitable for advanced nano-electronic and optoelectronic devices.
  • Further research is needed to overcome current challenges in synthesis and device fabrication.
  • Future work should focus on optimizing PtSe2 for practical applications and exploring novel device architectures.