Quantum Dots Reveal Spin Transport Properties of DNA Sensors DNA Biosensor MolecularBiology genetics QuantumDots nanotechnology nanoscience nanomaterials MaterialsToday
By Dr. Priyom Bose, Ph.D.Sep 7 2022Reviewed by Megan Craig, M.Sc. Due to their self-assembly function, DNA sensors have gained much attention as next-generation sensors that require an extremely low power supply.
In the application of spintronics, spin current plays the most crucial role. The spin transport phenomenon includes two important configurations, i.e., parallel configuration and anti-parallel configuration , which are linked to spin transmission. In semiconductors, the effective spin diffusion length is dependent on the charge flowing in the same direction as the spin current.
The process of adding ions and protons to the atom or molecule is known as protonation. This process plays a catalytic role in the spin transport phenomenon. A proton is incorporated into the organo-metallic interface to facilitate efficient spin transport current. Spin Transport Properties for DNA and Fe QD Organo-Metalic Junction The first principle approach, i.e., Non-Equilibrium Green’s Function and Density Functional Theory , were used to examine PC and APC configurations to understand the spin transport properties. Furthermore, the DNA sensor’s quantum scattering transmission characteristics were evaluated through Fe QD electrodes at room temperature.
Estimation of Tunneling Organo Metallic Contact Resistance revealed that at zero voltage, TOMCR was 99.99%, which was maintained by increasing the voltage up to 0.4. The TOMCR decreased by further increasing the voltage beyond 0.4.
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