molecular electronics
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Molecular Electronics. ANOOP YADAV ROLL NO-2708106. Overview. What is Molecular Electronics? Advantages of Molecular Electronics Molecular Switch Issues. What is Molecular Electronics?. Sometimes called moletronics - PowerPoint PPT PresentationTRANSCRIPT
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Molecular Electronics
ANOOP YADAVROLL NO-2708106
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Overview
1. What is Molecular Electronics?2. Advantages of Molecular
Electronics3. Molecular Switch4. Issues
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What is Molecular Electronics? Sometimes called moletronics Molecular electronics is a
branch of applied physics which aims at using molecules as passive or active electronic components.
These molecules will perform the functions currently performed by semiconductors.
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Why use Molecular Electronics? Size Power Speed Low Manufacturing Cost Easier to Manufacture
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Size
Molecular Electronics is a way to extend Moore’s Law past the limits of standard semiconductor Circuits.
100X smaller than their counterparts
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Power / Speed Currently Transistors cannot be
stacked, which makes them quite ineffecient!
Molecular technology will be able to add a 3rd dimension.
Femtoseconds switching times.
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Manufacturing Most designs use either spin
coating or Self-Assembly process.
Individual Molecules can be made exactly the same by the Billions.
Molecular assembly tends to occur at Room Temperature.
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Molecular Switch Semiconductor switches can be
made on a very small scale.
Perform computational functions when placed in the right combination.
Molecular switch is orders of magnitude smaller.
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Molecular Chiropticene Switch One molecule in size. Switch has two distinct states
Spatial Mirror images of one another. Electronically and Optically distinct
Distinct but Equal Chiral property
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Symmetric Amine Molecule
Rapid thermal oscillation between two forms of an Amine Molecule.
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“Assymetrical Narcisstic Reactions”
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Operation In practice, the switch is triggered
by light and controlled with an electric field.
Both of these actions can change the direction of the molecule’s dipole by 180 degrees.
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Operation cont’d
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Constructing the Switch
In order to have control of the crossed arrow dipole vector we must: Long axis for reaction to occur Dipole vector points along this axis Transformation cannot occur at room
temp.
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Orientation of Dipole Vectors
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Potential Energy Profile
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Prochiral Form
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Photo Reaction
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Finally…….
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Switch Properties Stability- Two equal but opposite
energy states in these molecules affords stablility as well as reversibility.
Speed- Femtosecond switching speeds
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Problems facing Moletronics Molecular electronics must still be
integrated with Silicon.
Among the important issues is the determination of the resistance of a single molecule (both theoritical and experimental).
It is difficult to perform direct characterization since imaging at the molecular scale is often impossible in many experimental devices.