Quantum Tunnelling Composite

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Quantum Tunneling Composites (or QTCs) are composite materials of metals and elastomeric binder.

What is significant about QTCs is that their resistance can be changed by the application of pressure. This happens because of Quantum tunnelling between the particles of QTCs. In an unpressured state the particles are far enough away that there is a very low chance of electrons tunneling through and so QTCs are near insulators (10¹² ohms). However when pressure is applied the particles can get very close (though they never touch) and the resistance can drop below 1ohm.

QTCs were discovered in 1996 and PeraTech Ltd was established to investigate them further. [1]

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