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Molecular Electronics Past, Present, Future? - page 7 / 33

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Bottom-Up  (Why Molecules?)

Molecules are small.

With transistor size at 180 nm on a side, molecules are some 30,000 times smaller.

Electrons are confined in molecules.

Whereas electrons moving in silicon have many possible energies that will facilitate jumping from device to device, electron energies in molecules and atoms are quantized - there is a discrete number of allowable energies.

Molecules have extended pi systems.

Provides thermodynamically favorable electron conduit - molecules act as wires.

Molecules are flexible.

pi conjugation and therefore conduction can be switched on and off by changing molecular conformation providing potential control over electron flow.

Molecules are identical.

Can be fabricated defect-free in enormous numbers.

Some molecules can self-assemble.

Can create large arrays of identical devices.

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