
576 Nanosensors: Physical, Chemical, and Biological
material, such as GaAs, AlGaAs, or AlN, and the SET is congured to sense
the piezoelectric voltage developed when the beam exes, then a consider-
ably higher displacement sensitivity can be achieved.
What are the applications of CNTs for determining mechanical parameters?
CNTs act as sensing materials in force, pressure, ow, mass, position, stress,
and strain sensors. (i) A tunable doubly clamped CNT electromechanical
oscillator executes guitar-string-like oscillation modes. Its resonance fre-
quency can be widely tuned and the devices can be used to transduce very
small forces. (ii