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Related Concept Videos

Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
20.3K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

68.3K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
68.3K
Ionic Crystal Structures02:42

Ionic Crystal Structures

17.7K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
17.7K
Metallic Solids02:37

Metallic Solids

20.9K
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....
20.9K
Ionic Radii03:10

Ionic Radii

33.8K
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
33.8K
Ionic Bonds00:42

Ionic Bonds

131.9K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
131.9K

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Nano-Ionic Solid State Resistive Memories (Re-RAM): A Review.

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    This summary is machine-generated.

    Nano-ionic devices, or resistive random-access memory (Re-RAM), are revolutionizing solid-state electronics. Research focuses on advanced materials and fabrication for faster, smaller, and more efficient memristor devices.

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    Area of Science:

    • Materials Science
    • Solid-State Electronics
    • Nanotechnology

    Background:

    • Memristors, the fourth fundamental electronic component, correlate charge and flux, enabling novel memory functionalities.
    • Nano-ionic devices utilizing ion conductors have spurred advancements in resistive random-access memory (Re-RAM).
    • The conceptualization of memristors by Chua in 1971 has been realized through solid-state implementations.

    Purpose of the Study:

    • To review the progress in materials science for memristor devices.
    • To explore various Re-RAM cell stack structures and materials.
    • To comprehensively cover synthesis, fabrication, and performance of memristive systems.

    Main Methods:

    • Review of current research in memristor materials.
    • Analysis of different Re-RAM cell architectures and materials.
    • Examination of synthesis approaches for nano-ionic conducting metal oxides.
    • Evaluation of fabrication methods and memory performance.

    Main Results:

    • Development of low-power, high-endurance, and high-retention Re-RAM devices.
    • Achieved fast switching speeds and nanoscale dimensions for memristors.
    • Successful implementation of 3D stacking to reduce die area.
    • Progress in materials engineering for enhanced memristive properties.

    Conclusions:

    • Nano-ionic materials are crucial for advancing memristor technology.
    • Continued research in materials and fabrication is key to realizing next-generation memory.
    • Memristive systems offer significant potential for future electronic applications.