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Related Concept Videos

Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
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Molecular Models

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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Molecular Shapes

Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
Two regions of electron density in a diatomic...
Network Covalent Solids02:18

Network Covalent Solids

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...
Covalent Bonds01:29

Covalent Bonds

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Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
08:07

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Published on: June 18, 2013

Molecular wires.

Dustin K James1, James M Tour

  • 1Chemistry Department, Rice University, MS-60, 6100 Main St., 77005, Houston, Texas, USA, dustin@rice.edu.

Topics in Current Chemistry
|December 20, 2011
PubMed
Summary
This summary is machine-generated.

Organic molecular wires offer a promising alternative to traditional metal wiring in electronic devices. Fully conjugated organic aromatic molecular wires are identified as the leading candidates for future logic and memory applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Organic Electronics

Background:

  • Molecular wires are investigated as potential replacements for conventional metal and silicon-based wires in electronic devices.
  • The field encompasses various organic molecular wires, including oligothiophenes, polyphenylenes, and carbon nanotubes, alongside organometallic options.

Purpose of the Study:

  • To review the current landscape of molecular wire research.
  • To identify the most suitable molecular wire candidates for integration into next-generation electronic devices.

Main Methods:

  • Literature review of molecular wire compounds and their properties.
  • Analysis of conduction measurement techniques for molecular wires.
  • Comparative assessment of different molecular wire types for electronic applications.

Main Results:

  • A diverse range of organic and organometallic molecular wires have been synthesized and studied.
  • Conduction in molecular wires can be measured using specialized techniques.
  • Fully conjugated organic aromatic molecular wires demonstrate significant potential.

Conclusions:

  • Fully conjugated organic aromatic molecular wires are the most promising candidates for replacing aluminum and copper wiring in logic and memory devices.
  • Further development of these organic molecular wires could lead to advancements in molecular electronics and optoelectronics.