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Related Concept Videos

Metallic Solids02:37

Metallic Solids

21.3K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
21.3K
The Electrical Double Layer01:30

The Electrical Double Layer

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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
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Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

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According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
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Resonance02:52

Resonance

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The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
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Valence Bond Theory02:45

Valence Bond Theory

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Overview of Valence Bond Theory
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Valence Bond Theory02:42

Valence Bond Theory

11.6K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Related Experiment Video

Updated: Mar 20, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
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Bound States in the Continuum in double layer structures.

LiangSheng Li1, Hongcheng Yin1

  • 1Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China.

Scientific Reports
|June 2, 2016
PubMed
Summary

Researchers explored light confinement in photonic crystals. They found tunable bound states in the continuum (BICs) in double-layer structures, dependent on slab spacing and phase matching conditions.

Area of Science:

  • Photonics
  • Optical physics
  • Materials science

Background:

  • Photonic crystal slabs offer unique light manipulation properties.
  • Bound states in the continuum (BICs) are exotic states with infinite theoretically localized energy.
  • Controlling BICs is crucial for advanced optical devices.

Purpose of the Study:

  • To investigate light confinement in single-layer photonic crystal slabs.
  • To explore tunable bound states in the continuum (BICs) in double-layer photonic crystal slabs.
  • To analyze the behavior of BICs in dielectric multilayer stacks.

Main Methods:

  • Theoretical investigation of reflectivity spectrums.
  • Analysis of single- and double-layer photonic crystal slabs.
  • Analytical study of the Drude lossless multilayer stack model.

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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
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Main Results:

  • Perfect light confinement achieved in single-layer photonic crystals by tuning structural parameters.
  • Tunable BICs demonstrated in double-layer photonic crystals, with occurrence dependent on inter-slab spacing.
  • Spacing dependence of BICs characterized as a phase matching condition, enabling BICs at various incident angles.

Conclusions:

  • Single-layer photonic crystals allow precise control over light confinement.
  • Double-layer photonic crystals and multilayer stacks provide tunable BICs.
  • The findings offer pathways for designing novel optical devices and sensors.