Circuit Level Modeling of Electrically Doped Adenine–Thymine Nanotube Based Field Effect Transistor

Abstract

We investigate the gate-controlled, electrically doped tunnelling current in Adenine-Thymine heterojunction nanotube-based Field Effect Transistor (FET). This analytical model FET is designed by Density Functional Theory (DFT) and Non-Equilibrium Green's Function (NEGF) based First principle formalisms. It is demonstrated that Band to Band Tunnelling (BTBT) is possible in relaxed Adenine-Thymine heterostructure nanotube. The evaluation of BTBT tunnelling probability to estimate tunnelling current for only ±0.01V applied bias voltage is calculated using Wentzel-Kramers-Brillouin approximation. Electrical doping is introduced to eliminate the probability of fault generation. By keen observation on the shift of energy levels in the band structure, the availability of high transmission coefficient peaks and current-voltage response we demonstrate the Schottky barrier nature for this geometrically pre-optimized bio-molecular FET. The doping concentration is varied from 0.0001V to 0.1V to achieve a substantially large amount of tunnelling current when the electronic temperature is kept at 300K. The E-k diagram or complex band structure of this heterostructure nanotube ensures its indirect semi-conducting nature. This is a first attempt to present a circuit-level demonstration using this Adenine-Thymine nanotube-based bio-molecular FET and validate the obtained results with the existing approaches.

Self-Healing Nanocomposites—Advancements and Aerospace Applications

“…Figure 7 establishes the self-healing efficiency of various nanocomposite samples. Among all nanocomposite samples, 0.5 wt.% contents of thymine functional carbon nanotube led to enhanced self-healing properties due to the existence of reversible hydrogen bonding interactions [111]. Guadagno and co-workers [108] industrialized epoxy nanocomposites with nonfunctional carbon nanotube, thymine functional carbon nanotube and barbiturate functional carbon nanotube for aerospace.…”

“…Figure 7 establishes the self-healing efficiency of various nanocomposite samples. Among all nanocomposite samples, 0.5 wt.% contents of thymine functional carbon nanotube led to enhanced self-healing properties due to the existence of reversible hydrogen bonding interactions [111]. Guadagno and co-researchers [112] fabricated tetraglycidyl methylene dianiline epoxy (cured with carboxyl-terminated butadiene acrylonitrile, 1,4-butanedioldiglycidylether-and 4,4′-diaminodiphenyl sulfone)-based nanocomposites.…”

Electrically Doped Nanoscale Devices Using First-Principle Approach: A Comprehensive Survey

“…Investigation of heterostructure biomolecular FET can be observed using this electrical doping technique. The quantum ballistic transport can be observed using this electrical doping phenomenon at the molecular level [ 85 ]. Using this theoretical approach electrically doped biomolecular switch is designed when using single-wall carbon nanotube (SWCNT) as electrodes [ 86 ].…”