TY - JOUR ID - 3933 TI - I-V Characteristics of a Molecular Wire of Polyaniline (Emeraldine Base) JO - International Journal of Nanoscience and Nanotechnology JA - IJNN LA - en SN - 1735-7004 AU - Milani Moghaddam, H. AD - Solid State Physics Department, University of Mazandaran, Babolsar, I. R. Iran Molecular Electronics Lab., University of Mazandaran, Babolsar, I. R. Iran Y1 - 2011 PY - 2011 VL - 7 IS - 4 SP - 201 EP - 204 KW - Molecular wire KW - Polyaniline (emeraldine base) KW - Landauer formalism KW - I-V characteristics DO - N2 - In this study, Polyaniline molecule (emeraldine base) is modeled as a molecular wire and the effects of the metal/molecule coupling strength and the molecule length on the current-voltage (I-V) characteristics are numerically investigated. Using a tight-binding Hamiltonian model, the methods based on Non-equilibrium Green’s function theory, Landauer formalism and Newns-Anderson model, our calculations indicate that the I-V curve has the step-like form and the current is very sensitive to the metal/molecule coupling strength. A negative differential resistance region is also exhibited after second voltage step in the I-V curves and the line slope at that region is studied as a function of two parameters, which are the metal/molecule coupling strength and the molecule length. UR - https://www.ijnnonline.net/article_3933.html L1 - https://www.ijnnonline.net/article_3933_4713fcfd8d857b57ad25b84e53368701.pdf ER -