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

fYear

2008

fDate

6-9 Jan. 2008

Firstpage

243

Lastpage

246

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NEMS.2008.4484327

Filename

4484327