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Related Concept Videos

Van der Waals Interactions01:24

Van der Waals Interactions

71.9K
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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Van der Waals Equation01:10

Van der Waals Equation

6.5K
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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Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation04:01

Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation

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Thus far, the ideal gas law, PV = nRT, has been applied to a variety of different types of problems, ranging from reaction stoichiometry and empirical and molecular formula problems to determining the density and molar mass of a gas. However, the behavior of a gas is often non-ideal, meaning that the observed relationships between its pressure, volume, and temperature are not accurately described by the gas laws.
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Quantum Numbers02:43

Quantum Numbers

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
52.1K
Atomic Radii and Effective Nuclear Charge03:08

Atomic Radii and Effective Nuclear Charge

62.3K
The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
62.3K
The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

59.5K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
59.5K

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Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
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Gate-Defined Quantum Confinement in InSe-Based van der Waals Heterostructures.

Matthew Hamer1,2, Endre Tóvári2, Mengjian Zhu1

  • 1School of Physics , University of Manchester , Oxford Road , Manchester , M13 9PL , U.K.

Nano Letters
|May 16, 2018
PubMed
Summary

Researchers demonstrated quantum confinement and single-electron manipulation in indium selenide (InSe) devices. This work highlights InSe as a promising two-dimensional (2D) material for advanced electronic and optoelectronic applications.

Keywords:
Two-dimensional materialscharge quantizationelectronic devicesindium selenidequantum dotsquantum point contacts

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Indium selenide (InSe) is a novel two-dimensional (2D) semiconductor with promising electronic properties.
  • Its tunable band gap and high electron mobility make it attractive for research.
  • Developing high-quality 2D material devices is crucial for next-generation electronics.

Purpose of the Study:

  • To demonstrate strong quantum confinement in few-layer InSe.
  • To show the manipulation of single electrons in InSe-based devices using electrostatic gating.
  • To explore the potential of InSe for quantum devices.

Main Methods:

  • Fabrication of devices using few-layer indium selenide crystals.
  • Application of electrostatic gating for device control.
  • Characterization of quantum phenomena like Coulomb blockade and 1D quantization.

Main Results:

  • Demonstrated strong quantum confinement effects in InSe devices.
  • Achieved gate-controlled quantum dots operating in the Coulomb blockade regime.
  • Observed one-dimensional quantization in point contacts with multiple plateaus.

Conclusions:

  • Indium selenide exhibits significant quantum confinement, enabling single-electron manipulation.
  • The study marks a milestone in developing quality devices from 2D materials.
  • InSe is a strong candidate for future electronic and optoelectronic applications.