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Related Concept Videos

Types of Semiconductors01:20

Types of Semiconductors

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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
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Polymer Classification: Crystallinity01:21

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
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Trends in Lattice Energy: Ion Size and Charge

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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
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Metallic Solids02:37

Metallic Solids

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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....
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Structures of Solids02:22

Structures of Solids

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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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Iterative sublattice amorphization facilitates exceptional processability in inorganic semiconductors.

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Inorganic semiconductors Ag2Te1-xSx exhibit unprecedented room-temperature plasticity through sublattice amorphization and Ag-ion diffusion. This unique mechanism enables ultrahigh extensibility and metal-like forming, paving the way for flexible electronics.

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Inorganic Chemistry

Background:

  • Cold-forming is vital for cost-effective metal production.
  • Inorganic semiconductors typically fracture under cold-forming due to brittleness.

Purpose of the Study:

  • To investigate a novel plastic deformation mechanism in silver chalcogenide semiconductors.
  • To achieve ultrahigh ductility in inorganic semiconductors for practical applications.

Main Methods:

  • Investigated Ag2Te1-xSx (0.3 ≤ x ≤ 0.6) for room-temperature plastic deformation.
  • Analyzed sublattice amorphization and Ag-ion diffusion under stress.
  • Utilized annealing to reverse amorphization.

Main Results:

  • Discovered a unique room-temperature plastic deformation mechanism involving sublattice amorphization and Ag-ion diffusion.
  • Achieved ultrahigh extensibility up to 10,150% in Ag2Te1-xSx.
  • Demonstrated iterative sublattice amorphization for metal-like forming processes.

Conclusions:

  • Sublattice amorphization is a critical plastic deformation mechanism in silver chalcogenide semiconductors.
  • This mechanism enables exceptional plastic deformability and reversible crystalline states.
  • Facilitates potential applications in flexible electronics and inspires research into more ductile inorganic semiconductors.