Title :
Capillary tunneling characteristics of aromatic halides on gallium electrodes
Author :
Li, Xun ; Fan, Xiaolin ; Liu, Xiangfen ; Zhu, Min ; Jin, Hai
Author_Institution :
Key Lab. of Org.-Pharm. Chem., Gannan Normal Univ., Ganzhou
Abstract :
The tunneling characteristics based on the capillary tunnel junctions of aromatic halides such as C6H4C12, C12H8C12, C6H4Br2, C12H8Br2, C6H4I2, C12H8I2 sandwiched between gallium electrodes were described. The current-voltage (I-V) characteristics of the tunnel junctions fabricated by this method show fine rectifying behavior. We compare the conductance of different terminal atom-gallium combinations and find that the conductance is larger when the tunnel junction is assembled by iodine rather than bromine or chlorine. We also find that the tunneling characteristics of functional molecular depend on the number of phenyls. The same trend of HOMO-LUMO energy gap theoretically calculated from functional molecules by the Gaussian 98 package is observed. The results indicate that the nature of functional molecules could significantly contribute to the conductance characteristics of molecular junctions.
Keywords :
electrochemical electrodes; tunnelling; Gaussian 98 package; aromatic halides; capillary tunneling characteristics; current-voltage characteristics; energy gap; functional molecules; gallium electrodes; rectifying behavior; terminal atom-gallium combinations; tunnel junctions; Assembly; Chemistry; Electrodes; Electrons; Gallium compounds; Gold; III-V semiconductor materials; Packaging; Systems engineering and theory; Tunneling; Capillary tunnel junction; aromatic halide; conduction gap; gallium electrode;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2008. NEMS 2008. 3rd IEEE International Conference on
Conference_Location :
Sanya
Print_ISBN :
978-1-4244-1907-4
Electronic_ISBN :
978-1-4244-1908-1
DOI :
10.1109/NEMS.2008.4484327
