Interface Trap Charge Analysis of Junctionless Triple Metal Gate High-k Gate All Around Nanowire FET-Based Biotin Biosensor for Detection of Cardiovascular Diseases

In this paper, a triple metal gate high-k gate all around junctionless nanowire field-effect transistor biotin biosensor has been developed to study the impact of different interface trap charges (ITCs) on device performance. The output characteristics, such as transconductance, drain current, total current density, and threshold voltage of proposed device have been examined. All results were authenticated using ‘‘atlas-3D’’ device simulation tool. Effect of interface trap charge on output characteristics, such as transconductance, switching ratio, leakage current, and total current density, including air and biotin biomolecule, have been studied. Drain-off current ratio was considered as a sensing metric for biotin biomolecule detection with different interface trap charges (ITCs). For instance, drain-off current results of biotin biomolecule in the presence of interface trap charge are \({3.12 \times 10}^{-12}\,\mathrm{A}\), \({2.10 \times 10}^{-13}\,\mathrm{A}\) and \({4.07 \times 10}^{-16}\,\mathrm{A}\) for positive, neutral, and negative interface trap charges, respectively. Finally, we have found that a negative ITC has a positive impact on our proposed biotin biosensor device performance than the positive ITCs, proving its efficacy for the detection of cardiovascular diseases in biomedical applications.