Nanotechnology has had a significant impact on nanobiosensors, so that it is now possible to prepare a variety of nanomaterials with controllable size, shape, surface charge and desirable physical properties

The transducers (nanobiosensors) themselves  are divided into several categories, which are divided based on  the signals received: electrochemical, optical, thermal,  piezoelectric, etc. The third part is the processor, which  is responsible for displaying the signals converted by the transducer  . In addition, the attractive properties of nanomaterials pave the way for the construction of  a wide range of electrochemical sensors that improve analytical power  .

Nanotechnology  has had a significant impact on nanobiosensors, so that  it is now possible  to prepare a variety of nanomaterials with controllable size, shape, surface charge and desirable physical properties  . The potential for use as a non-invasive diagnostic tool and the combination of  multiple methods in a single probe are two major advantages of nanomaterials that  can be mentioned. All these factors lead to  high sensitivity in them and a deeper understanding of environmental processes.  

The ability of nanobiosensors to detect nano- and bio-biomolecules and  the characteristics such as sensitivity, flexibility and scalability  of this sensor can  be used as a new paradigm in analytical and clinical tools.  Nanomaterials  usually increase the sensitivity of sensors in nano-electrochemical or nano-biological methods. Among  the developed nanomaterials, structures such as carbon nanotubes  (CNTs), silicon nanowires (SiNWs) and  conductive polymer nanotubes (CPNTs) are significantly  used in the manufacture of sensitive sensors.

Conclusion :

In the case of nanobiosensors, critical dimensions  are directly related to the sensing performance of the nanobiosensor, such as the dimension that  controls the amount of surface area available for mapping the detection elements  , the dimension that measures  the strength of a signal in electrochemical nanobiosensors  , or the accessible surface area that detects the formation of complexes between the detection elements and  the target analytes in mechanical transducer nanobiosensors  . Structures such as nanowires, metal nanoparticles, magnetic nanoparticles, single-walled plates, and carbon nanotubes  can be used for nanochemical sensing  due to their unique nanoelectrical, optical, and magnetic properties.