Quantum Tunneling Composite

Quantum Tunneling Composites (or QTCs) are composite materials of metals and non-conducting elastomeric binder, used as pressure sensors. As the name implies, they operate using quantum tunneling: without pressure, the conductive elements are too far apart to conduct electricity; when pressure is applied, they move closer and electrons can tunnel through the insulator. The effect is far more pronounced than would be expected from classical (non-quantum) effects alone, as classical electrical resistance is linear (proportional to distance), while quantum tunneling is exponential with decreasing distance, allowing the resistance to change by a factor of up to 10¹² between pressured and unpressured states.

Additional recommended knowledge

Recognize and detect the effects of electrostatic charges on your balance

Daily Visual Balance Check

How to quickly check pipettes?

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

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