TY - JOUR ID - TI - Electron Transport Properties in Molecule Transistors AU - Sabah Mohammed Mlkat AL-Mutoki PY - 2016 VL - 3 IS - 1 SP - 9 EP - 13 JO - Muthanna Journal of Pure Science (MJPS) مجلة المثنى للعلوم الصرفة SN - 22263284 25725181 AB - In this paper, we have discussed transistors made from single molecules in which one silver ion is connectedto gold electrodes by organic barriers. By tuning the length of the organic barrier we are able to control the couplingbetween the ion and the electrodes. For relatively long linker molecules, giving weak coupling, the molecule functionsas a quantum dot. This work shows that the properties of a molecular transistor can be controlled by the physicalproperties of the molecule .The ability to design the electronic states of a molecular device using (SIESTA andSmeagol), together with the ability to measure individual molecules, will play an important role in molecular electronicsand in the physics of nanometer-scale systems. This paper is also to study electron transport in nanoscale objects,especially the devices made from single molecules. We show that the qualitative features of this interference effectarecaptured by the Smeagol COD described above through an appropriate choice of parameters. Finally, we note thatquantum interference in such multibranch structures leads tothe appearance of large, internal countercurrents, whichexceedthe external current carried by the electrodes, these calculations presented in this work were processing in Centrefor Nanoscale Dynamics and Mathematical Modeling in the Lancaster universe uk .

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