Online ISSN: 2515-8260

Author : Allu, M Vamsi Krishna


SIMULATION APPROACH TO DESIGN HIGH SENSITIVE NEMS BASED SENSOR FOR MOLECULAR BIOSENSING APPLICATIONS

Miranji Katta; Sandanalakshmi R; P. Srinivasulu; M Vamsi Krishna Allu; K. Lavanya

European Journal of Molecular & Clinical Medicine, 2021, Volume 8, Issue 3, Pages 1730-1738

This research article utilizes the finite element method of analysis to achieve
the finest throughput of piezoresistive nano cantilever sensor by minimizing the
dimensions of both physical piezoresistor and cantilever. The
750nmx300nmx15nm-sized cantilever is incorporated with 5nm substantial Si as
piezoresistor is used for revision. The proposed cantilever output performance has
been calculated based onsurface stress sensitivity and displacement. A
maximumresultant displacement value of about 12nm for the load of 100pN has
been obtained . The Performance comparison between Polysilicon and SiO2
cantilever has been found out by applied identical load and measured displacement.
Similarly the sensitivity of the cantilever sensor by parametric sweep on thickness is
applied for both cantilever and piezoresistor. The parametric sweep results shows
that the sensitivity of the cantilever is highest when the thickness of both cantilever
and piezoresistoris at the smallest. Poly silicon and SiO2 based cantilevers with the
built-in longitudinal cut at the bottom create stress concentration regions which will
greatly improved sensitivity as high as 13.89% and 31.81% in comparison with
other Non-SCR cantilevers for the proposed design.