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Length-dependent conductance of molecular wires and contact resistance in metal–molecule–metal junctions

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Length-dependent conductance of molecular wires and contact resistance in metal–molecule–metal junctions
นักวิจัย : Liu, Hongmei , Wang, Nan , Zhao, Jianwei , Guo, Yan , Yin, Xing , Boey, Freddy Yin Chiang , Zhang, Hua
คำค้น : DRNTU::Engineering::Materials.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2551
อ้างอิง : Liu, H., Wang, N., Zhao, J., Guo, Y., Yin, X., Boey, F. Y. C., & Zhang, H. (2008). Length-dependent conductance of molecular wires and contact resistance in metal–molecule–metal junctions. ChemPhysChem, 9(10), 1416-1424. , 1439-7641 , http://hdl.handle.net/10220/8611 , http://dx.doi.org/10.1002/cphc.200800032
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : ChemPhysChem
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Molecular wires are covalently bonded to gold electrodes—to form metal–molecule–metal junctions—by functionalizing each end with a SH group. The conductance of a wide variety of molecular junctions is studied theoretically by using first-principles density functional theory (DFT) combined with the nonequilibrium Green′s function (NEGF) formalism. Based on the chain-length-dependent conductance of the series of molecular wires, the attenuation factor β is obtained and compared with the experimental data. The β value is quantitatively correlated to the molecular HOMO–LUMO gap. Coupling between the metallic electrode and the molecular bridge plays an important role in electron transport. A contact resistance of 6.0±2.0 KΩ is obtained by extrapolating the molecular-bridge length to zero. This value is of the same magnitude as the quantum resistance.

บรรณานุกรม :
Liu, Hongmei , Wang, Nan , Zhao, Jianwei , Guo, Yan , Yin, Xing , Boey, Freddy Yin Chiang , Zhang, Hua . (2551). Length-dependent conductance of molecular wires and contact resistance in metal–molecule–metal junctions.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Liu, Hongmei , Wang, Nan , Zhao, Jianwei , Guo, Yan , Yin, Xing , Boey, Freddy Yin Chiang , Zhang, Hua . 2551. "Length-dependent conductance of molecular wires and contact resistance in metal–molecule–metal junctions".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Liu, Hongmei , Wang, Nan , Zhao, Jianwei , Guo, Yan , Yin, Xing , Boey, Freddy Yin Chiang , Zhang, Hua . "Length-dependent conductance of molecular wires and contact resistance in metal–molecule–metal junctions."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2551. Print.
Liu, Hongmei , Wang, Nan , Zhao, Jianwei , Guo, Yan , Yin, Xing , Boey, Freddy Yin Chiang , Zhang, Hua . Length-dependent conductance of molecular wires and contact resistance in metal–molecule–metal junctions. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2551.