MOLELECTRONICSBy Krunal Mhatre

Guided By V.R.Chitte

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

First computer Latest computer

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

EXAMPLE

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.

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.

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

Molecular Devices

• Molecular Wire

• Molecular Diode

• Molecular Transistor

MOLECULAR WIRE

The structure of a Mo6S9-xIx

Mo atoms are blue, iodine atoms are red and sulphur atoms are green

• Rectifying diodeMOLECULAR DIODE

Forward biased condition

Reverse biased condition

rectifying diode

•Tunnelling diode

Structure of molecular resonant tunnelling diode

showing the ‘OFF’ state

showing the ‘ON’ state

MOLECULAR TRANSISTOR

ADVANTAGES Tiny

Low power consumption

Able to integrate large circuit

Re-configurable

DISADVANTAGES

Controlled fabrication within specified tolerances.

Hard experimental verification.

APPLICATION

Sensors

Displays, Energy transduction devices

Smart Material, Molecular scale transistors

Molecular Motors, Logic and memory devices

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

THANK YOU