Electronic characteristics of Au-mercaptohexadecanoic acid-Au junction in a capillary.
The electrical property of a self-assembled monolayer (SAM) of mercaptohexadecanoic acid (HS-C15H30-COOH) has been investigated with a tunneling junction confined in a capillary. This capillary method can shun the interference of vacuum gap. The contact area can be determined according to the diameter of capillary. The nonlinear current-voltage curve and dl/dV curve are measured in the potential range of +/-0.8 V. The slight asymmetry of I-V curve and dl/dV curve is attributed to the different coupling between the metal and the end-groups of molecule. This method will supply a simple way to measure the property of single molecules and monolayers.
Yan
Hui-Juan
HJ
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
Ren
Ling-Ling
LL
Fan
Xiao-Lin
XL
Liang
Han-Pu
HP
Hu
Jin-Song
JS
Wan
Li-Jun
LJ
Wang
Chen
C
Bai
Chun-Li
CL
D002197:Capillary Action; D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D004581:Electronics; D006046:Gold / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods*; D010169:Palmitic Acids / Q000737:chemistry*; D010316:Particle Size; D012666:Semiconductors; D013499:Surface Properties
C450319:16-mercaptohexadecanoic acid; D010169:Palmitic Acids; D006046:Gold