Analysis of CNT based nano bio-sensor for virus detection

Abstract

In the present study, a Nano mechanical resonator is designed and used for the process of virus detection. The biosensor is designed using the single-walled carbon nano-tube (SWCNT). The investigations are done on the vibrations of the cantilevered sensor, when the virus is present at the tip. The cantilevered SWCNT will be able to identify the biomolecule that may be present at the tip of the resonator. The calculations for determining the natural frequency are done using the finite difference method. A comparison of the results has been done with the exact solution. It is found that the designed sensor is able to provide measureable frequency shifts even when a light virus approaches the cantilever. The sensitivity of the entire system is found to be able to detect the virus in the zeptogram scale. It is discovered that the natural frequency as calculated by the finite difference method match the frequency as calculated by the exact solution.