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Padmanaban, B.
- Modeling and Simulation of Gate Engineered Gate All-Around MOSFET for Bio-Molecule Detection
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Authors
Affiliations
1 Department of Electronics and Instrumentation Engineering, JJ College of Engineering and Technology, Ammapettai, Poolangulathupatti (Post), Trichy - 620 009, Tamil Nadu, IN
2 Department of ECE, SASTRA University, Tirumalaisamudram, Thanjavur - 613 401,Tamil Nadu, IN
1 Department of Electronics and Instrumentation Engineering, JJ College of Engineering and Technology, Ammapettai, Poolangulathupatti (Post), Trichy - 620 009, Tamil Nadu, IN
2 Department of ECE, SASTRA University, Tirumalaisamudram, Thanjavur - 613 401,Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 43 (2016), Pagination:Abstract
Objectives: In this paper, modeling and simulation of a triple material gate stack gate all around MOSFET biosensor for the detection of biomolecules under dry environment conditions has been carried out. Method: A nanocavity is formed in the proposed device and its surface potential values are estimated by solving 2D Poisson and Schrödinger equations using Leibmann’s iteration method. The surface potential values are obtained for both the presence and absence of biomolecules. To the best of our knowledge, the effect of engineering on the gate stack gate all around MOSFET biosensor characteristics has been studied for the first time and its characteristics such as sensitivity and drain current are obtained. Findings: It is found that the implementation of gate engineering in the gate stack gate all around MOSFET improves the characteristics of the device. Improvements: The proposed device may be improved by implementing the device as an optical biosensor for detection of biomolecules.Keywords
Bio-Molecule Detection, Gate All Around MOSFET, Gate Engineering, Modelling, Simulation.Full Text
- Electrophysiological and Behavioural Responses of Banana Pseudostem Weevil, Odoiporus longicollis Olivier (Coleoptera:Curculionidae) to Aggregation Pheromone, 2-Methyl-4- Heptanol and Host Plant Kairomones
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Authors
Affiliations
1 ICAR-National Research Centre for Banana, Thayanur Post, Thogamalai Road, Tiruchirappalli 620 102, IN
1 ICAR-National Research Centre for Banana, Thayanur Post, Thogamalai Road, Tiruchirappalli 620 102, IN
Source
Current Science, Vol 116, No 10 (2019), Pagination: 1753-1757Abstract
Laboratory bioassays were conducted using an electroantennogram (EAG) and Y-tube olfactometer to study the electrophysiological and olfactory responses of banana pseudostem weevil (BSW), Odoiporus longicollis to its aggregation pheromone, 2-methyl-4- heptanol (2M4H) and host plant extract (HPE). The aggregation pheromone and HPE from highly susceptible cultivar Nendran were tested individually and in combination to ascertain the synergistic effect of HPE on 2M4H to the BSW. The peripheral response of antennae to the 2M4H + HPE combination elicited significantly strong amplitude of 4.089 ± 0.043 mV in males in comparison to females over the aggregation pheromone and HPE individually. Dose-dependent responses indicated difference between sexes and concentrations. Behavioural assay using Y-tube demonstrated that both sexes responded to host volatiles, and that males were more sensitive than females. Similarly, both the sexes responded most strongly (64.21% ± 3.91% of males and 55.47% ± 3.06% of females) to the odour sources comprising pheromone with host plant volatiles. Addition of HPE to 2M4H significantly increased EAG activity and also the attraction as indicated in the Y-tube behavioural bioassay; thus, the blend forms a good attractant. The present study provides information useful in developing pheromonebased lure in conjunction with HPE for monitoring and mass-trapping of O. longicollis.Keywords
Aggregation Pheromone, Banana Pseudostem Weevil, Electroantennogram, Host Plant Extract.Full Text
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