Label-free monitoring of biomaterials has become spotlight topic for the advanced nano-biosensing fields. In this regard, a non-destructive doping-less tunneling carbon nanotube field effect transistor (DL-TCNTFET) -based biosensor using the charge plasma concept is introduced. In doping-less structures, source and drain are created using the concept of charge plasma and by selecting appropriate work function of source and drain metals. The sensitivity of DL-TCNTFET is investigated in terms of dielectric constant variations at different bias conditions. The simulation is carried out in the ballistic regime by simultaneously solving the Poisson and Schrodinger equations in a self-consistent way using the non-equilibrium Green’s function in the form of state space approach. Simulations show that the DL-TCNTFET has better ambipolar behavior and also lower OFF current by reducing the dielectric constant of biomolecules. In addition, the ON current and biosensor sensitivity are significantly improved by increasing the dielectric constant.

中文翻译：

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使用基于隧道碳纳米管的生物传感器进行无损无标记生物材料检测

生物材料的无标签监控已成为高级纳米生物传感领域的关注焦点。在这点上，引入了使用电荷等离子体概念的基于非破坏性的无掺杂隧道碳纳米管场效应晶体管（DL-TCNTFET）的生物传感器。在无掺杂结构中，使用电荷等离子体的概念并通过选择适当的源极和漏极金属功函数来创建源极和漏极。根据不同偏置条件下的介电常数变化研究了DL-TCNTFET的灵敏度。使用状态空间方法形式的非平衡格林函数，以自洽方式同时求解泊松和薛定inger方程，从而在弹道状态下进行了仿真。仿真表明，DL-TCNTFET具有更好的双极性行为，并且通过降低生物分子的介电常数还具有较低的截止电流。另外，通过增加介电常数，可以显着提高导通电流和生物传感器的灵敏度。