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ABSTRACT This review paper is dedicated to the study of the literature related with the DNA based Molecular Junction Devices It first focuses on the Molecular Devices with the area of interest being molecular wires The DNA being a self assembled Molecular wire we will look into the the DNA based Molecular Junction Devices A lot of research has been done on the Charge Transport Mechanism in the DNA We will see whether it is hopping mechanism or tunneling mechanism or some other Further as it has been researched that DNA can be used as a molecular wire we would concentrate our research on the various factors that would effect the conductivity of the DNA wire The various factors can be Length sequence Structural Fluctuations such as stretching the quantity of nucleotide content the electrode material used the miller orientation of the electrode etc Further we would see the various electronic structures based on DNA and its bases We would also briefly look into how far the four bases of DNA i e Adenine Guanine Thymine Cytosine have been exploited so far and their conductivities and their use to make some devices So we will review the literature related to these topics and see into the challenges faced so far and what is the future scope in this field
