ABSTRACT
We propose and investigate a biosensor based on a transparent dielectric-modulated dual-trench gate-engineered metal-oxide-semiconductor field-effect transistor (DM DT GE-MOSFET) for label-free detection of biomolecules with enhanced sensitivity and efficiency. Various sensing parameters such as the I ON/I OFF ratio and the threshold voltage shift are evaluated as metrics to validate the proposed sensing device. Additionally, S Vth (the V th sensitivity) is also analyzed, considering both positively and negatively charged biomolecules. In addition, radiofrequency (RF) sensing parameters such as the transconductance gain and the cutoff frequency are taken into account to provide further insight into the sensitivity of the proposed device. Furthermore, the linearity, distortion, and noise immunity of the device are evaluated to confirm the overall performance of the biosensor at high (GHz) frequency. The results indicate that the proposed biosensor exhibits a S Vth value of 0.68 for positively charged biomolecules at a very low drain bias of 0.2 V. The proposed device can thus be used as an alternative to conventional FET-based biosensors.
ABSTRACT
Experiments were carried out to study the effect of two fungal bioagents along with mustard oil cake and furadan against root knot nematode Meloidogyne incognita infecting tomato under greenhouse condition. Bioagents viz., Paecilomyces lilacinus and Trichoderma viride alone or in combination with mustard cake and furadan promoted plant growth, reduced number of galls/plant, egg masses/root system and eggs/egg mass. The fungal bioagents along with mustard cake and nematicide showed least nematodes reproduction factor as compared to untreated infested soil.
