Recent Advances in Carbon Nanotube Flow- Sensor: A Review
The flow of a liquid on single walled carbon (SWNTs) or multi-walled Nanotube (MWNTs) bundles induces a voltage in the sample along the direction of the flow. The magnitude of the voltage depends on the sensitivity on the ionic conductivity and on the polar nature of the liquid. This makes nanotubes as highly sensitive flow sensors and energy conversion devices. Carbon nanotubes have been among the most studied materials during the last two decades. They have many remarkable properties, such as high tensile strength, electrical conductivity however, one of the unique property is its viscoelastic behaviour in a wide range of temperature that is not shown even by any solid so far. The present article reviews the recent advances in carbon and its allotropes, the allotropes that are used to develop nanotubes, the wonderful properties of nanotubes and their applications in science and technology with special emphasis on the carbon Nanotube flow sensors.