Biologically Sensitive FETs: Holistic Design Considerations from Simulation, Modeling and Fabrication Perspectives

AlGaN/GaN high electron mobility transistor for various sensing applications: A review

“…Likewise, many simulation reports are there where the researchers have attempted to emulate the biological entities like proteins, DNA, antibodies etc in the simulation platform to investigate the biosensing attributes of the sensor. The various approaches include the representation of neutral biomolecules through its dielectric constant and for charged biomolecules like DNA it is represented by the dielectric constant as well as the charge associated to the biomolecule [118]- [121]. There are many designs reported in the literature such as nanogap embedded cavity, dual cavity, underlap and open gate designs.…”

Fe-Doped SrCoOx FET Sensors for Extreme Alkaline pH Sensing

“…Among perovskite materials, the SrCoO x -based electrolyte-gated FET sensors exhibit stable measurements and a high level of sensitivity to pH levels in highly alkaline environments . In contrast to conventional FET pH sensors which are based on the electrical double layer, SrCoO x -based electrolyte-gated FET sensors could effectively detect extreme alkalinity through the introduction of O 2– into the oxygen vacancies (V o ) of SrCoO x by the presence of concentrated OH – . − The reduction of V o leads to a transition in the semiconductor-metallicity characteristics of SrCoO x , resulting in an unparalleled sensing capability toward extreme alkaline conditions . However, SrCoO x displays a distinct response to solutions within the normal pH range, restricting its suitability for pH detection in a broader pH range.…”