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Related Concept Videos

Network Covalent Solids02:18

Network Covalent Solids

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
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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...
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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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Unit Cells01:18

Unit Cells

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A crystal's internal structure is an orderly array of atoms, ions, or molecules, and the details of this array significantly influence the solid's properties. In a crystal, periodically repeating 'structural motifs' - which could be atoms, molecules, or groups thereof - create a 'space lattice.' This is essentially a three-dimensional, infinite array of points, each surrounded by its neighbors in an identical way, forming the basic structure of the crystal.A 'unit cell' is a theoretical...
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Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
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Molecular Models

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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
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Wired up: interconnecting two-dimensional materials with one-dimensional atomic chains.

Youmin Rong1, Jamie H Warner

  • 1Department of Materials, University of Oxford , Parks Road, Oxford OX1 3PH, United Kingdom.

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|December 5, 2014
PubMed
Summary
This summary is machine-generated.

Researchers discovered one-dimensional (1D) atomic wires in hexagonal boron nitride, extending their presence in two-dimensional (2D) materials. This finding advances the study of 1D atomic wires and their applications in nanotechnology.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Atomic wires represent one-dimensional (1D) materials formed by sequentially bonded atoms.
  • In two-dimensional (2D) materials like graphene, atomic wires act as interconnects at nanoconstrictions.
  • Previous research focused on atomic wires in graphene.

Discussion:

  • This study extends the observation of 1D atomic wires to hexagonal boron nitride (h-BN), another significant 2D material.
  • Aberration-corrected transmission electron microscopy (TEM) is crucial for atomic-level structural analysis of these wires.
  • The formation of nanowires in transition metal dichalcogenides (TMDs) under electron-beam irradiation is also discussed.

Key Insights:

  • 1D atomic wires have been successfully identified and characterized in hexagonal boron nitride.
  • Electron-beam irradiation conditions can induce nanowire formation in various 2D materials, including TMDs.
  • Advanced microscopy techniques are essential for resolving atomic structures in 1D and 2D materials.

Outlook:

  • Future research will explore atomic wires in novel 2D materials and carbon, boron, and nitrogen hybrids.
  • Understanding atomic wire formation and properties is key for developing next-generation electronic and nanoscale devices.
  • The integration of atomic wires into hybrid material systems offers new avenues for advanced functionalities.