Sensor is a detection device, it can be detected information into other forms of output to meet the requirements of information transmission, storage, recording, etc.. Nowadays, many fields, such as agriculture, marine exploration, industrial automation, etc. to use the sensor. Carbon fiber is light, strong, has good conductivity and plasticity, can be used to make miniature sensors.
Carbon fiber sensors have the following features.
1,The sensor area is small, can form a thin and stable hemispherical diffusion layer, produce edge effect.
2,Small capacitance of double electrical layer, fast mass transfer rate, appear in the time-independent steady-state current, in the determination of electrolyte is not required.
3,The current density is large, and has a large sound-to-noise ratio, which is hundreds of times that of ordinary sensors.
4,The current flowing through the miniature sensor is small, and the IR drop is small. These characteristics of the sensor different from the conventional, can make the carbon fiber sensor used in some special fields. For example, the field of living organisms. The sensor is inserted into the tissue or cells, can be detected without destroying the body on the basis of the information needed.
With the development of science and technology, the carbon fiber sensor is more and more fine, now has been reduced from the original size of a few microns to hundreds of nanometers, belonging to the nanometer level. 1990, the emergence of nanometer disk electrode, and then appeared with the flame etching method of nanosensors, the tip of the diameter of 100 nanometers. 1994, and the research of plasma etching method of nanosensors prepared. Sensors. This has made it possible to move from the tissue level to the level of individual living cells.
