Quantum tunneling composite, SEM
Numéro d’image : 12582336
| Quantum tunnelling composite. Scanning electron micrograph (SEM). Quantum tunnelling composites (or QTCs) are composite materials of metals ( blue) and non-conducting elastomeric binder, used as pressure sensors. They use quantum tunnelling: 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 tunnelling is exponential with decreasing distance, allowing the resistance to change by a factor of up to 1012 between pressured and unpressured states. QTC can be used to make membrane switches like those used on mobile phones, pressure sensors and speed controllers. Magnification X 75 @10cm | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Gschmeissner, Steve |
| Taille de l’image : | 4809 px × 3634 px |
| Model Release : | Non requis |
| Restrictions : | - |
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