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Tiny Motor Spins on Command!
1 Nov
Summary
- A new molecular motor mimics an ancient Archimedes screw design.
- Electricity powers the motor, with voltage changes reversing direction.
- Rotation increases electrical conductivity by up to 100 times.
A groundbreaking molecular motor, inspired by the ancient Archimedes screw, has been developed. This minuscule machine, measuring only a few millionths of a millimeter, spins when subjected to an electric current. Researchers can precisely control its rotation by altering the direction of the electrical voltage, marking a significant advancement in nanomachinery.
Experiments revealed a surprising phenomenon: the motor's electrical conductivity dramatically increases by up to 100-fold when it rotates. Theoretical calculations suggest that this occurs because rotation makes highly conductive molecular positions accessible, which the molecule naturally avoids when at rest.
This innovative device is the result of an international collaboration between scientists in Denmark, Israel, and Germany. Their combined experimental and theoretical work has uncovered a new operating principle for machines at the extreme limits of miniaturization. The achievement opens doors for future developments in molecular electronics and spintronics.
