Main molecular electronics.pdf
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Transcript of Main molecular electronics.pdf
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MOLELECTRONICSBy Krunal Mhatre
Guided By V.R.Chitte
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MOORE'S LAW
The number of transistor that can be place on a single integrated circuit double about every two year.
Gordon E. Moore (1965)
logicElement = 2(year/1.5)
cm2
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First computer Latest computer
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What is molecule?
Molecule is small particle of chemical element or compound
That has the chemical properties of that element
Molecule made up of atom that are held together
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EXAMPLE
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MOLELECTRONICS
Molelectronics is abbreviations for MOLECULAR ELECTRONICS. It is branch of electronics in which individual molecules perform in same function as microelectronics devise such as diode.
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HISTORYIn 1940 Robert Muliken and Albert Szent-Gyorgy advances the concept of
charge transfer using molecule.
In 1974 paper from Ari Aviram and Mark Ratner illustrate a theoritcal molecular rectifier.
In 1988 Aviram described a single molecule Field effect transistor.
further concept were propose by the Forrest carter which include single molecule logic gate in same year.
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PRACTICALLY IMPLEMENTED
C. Joachim and J.K.Gimzewsky first experimented the conductance of single molecule on c60 molecule in IBM
In 1997 Mark Reed and co-worker add few hundred molecules
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Molecular Devices
• Molecular Wire
• Molecular Diode
• Molecular Transistor
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MOLECULAR WIRE
The structure of a Mo6S9-xIx
Mo atoms are blue, iodine atoms are red and sulphur atoms are green
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• Rectifying diodeMOLECULAR DIODE
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Forward biased condition
Reverse biased condition
rectifying diode
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•Tunnelling diode
Structure of molecular resonant tunnelling diode
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showing the ‘OFF’ state
showing the ‘ON’ state
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MOLECULAR TRANSISTOR
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ADVANTAGES Tiny
Low power consumption
Able to integrate large circuit
Re-configurable
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DISADVANTAGES
Controlled fabrication within specified tolerances.
Hard experimental verification.
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APPLICATION
Sensors
Displays, Energy transduction devices
Smart Material, Molecular scale transistors
Molecular Motors, Logic and memory devices
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CONCLUSIONMolecular electronics clearly has the advantage of size.
Molecular systems, or systems based on small organic molecules, possess interesting and useful electronic properties.
Molecular electronics is reaching a stage of trustable and reproducible experiments.
The potential application of molecular electronics has already attracted the interest of some large corporate
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THANK YOU