In this paper, the label free detection of neutral and charged biomolecules with the potential capability of dielectric modulated double gate junctionless metal oxide semiconductor field effect transistor (DM-DGJLT) is explored. The design parameters of biosensor have been varied to investigate the sensitivity of the proposed device. The sensitivity of the proposed device is explored by using the high K oxide and the dielectric constant is further modulated by considering different biomolecules in the cavity. The proposed device offers best ON current of order ~ 10^-4 A/um, OFF current ~ 10^-16 A/um and ON/OFF current ratio of 10¹².The deviation in the threshold voltage found to be ΔV_th=0.34 V and ΔV_th=0.23 V for K = 10 and K = 1 respectively. Also, other performance parameters such as subthreshold slope, drain induced barrier lowering and central potential are also explored for the proposed device. The cavity length along with dielectric constant is also varied to study the performance of the biosensor. The OFF current reduces with the reduction in cavity length. Therefore, ON/OFF current ratio found to be higher for lower cavity length. It is also concluded that sensitivity for the biosensor is higher by the absorption of high-K protein biomolecules in the cavity region. Also, the effect of steric hindrance and Partial hybridization in proposed biosensor is also explored.

在本文中，探讨了具有介电调制双栅极无结金属氧化物半导体场效应晶体管（DM-DGJLT）的潜在能力的中性和带电生物分子的无标记检测。生物传感器的设计参数已经改变，以研究所提出设备的灵敏度。通过使用高 K 氧化物探索了所提出装置的灵敏度，并通过考虑腔中的不同生物分子进一步调节介电常数。所提出的器件提供了约 10 ^-4  A/um 的最佳导通电流、约 10 ^-16  A/um 的关断电流和 10 ^{12 的}开/关电流比。发现阈值电压的偏差为 ΔV _th =0.34 V和 ΔV _th对于 K = 10 和 K = 1，分别为 =0.23 V。此外，还针对所提出的器件探索了其他性能参数，例如亚阈值斜率、漏极诱导势垒降低和中心电位。腔长度和介电常数也发生变化以研究生物传感器的性能。截止电流随着腔长度的减小而减小。因此，发现腔长越短，开/关电流比越高。还得出结论，生物传感器的灵敏度因空腔区域中高 K 蛋白生物分子的吸收而更高。此外，还探讨了空间位阻和部分杂交在所提出的生物传感器中的影响。