| AVS 54th International Symposium | |
| Nanometer-scale Science and Technology | Wednesday Sessions |
| Session NS2+EM-WeA |
| Session: | Nanoscale Devices and Nanowires II |
| Presenter: | N.J. Lee, Myongji University, Korea |
| Authors: | N.J. Lee, Myongji University, Korea S.B. Kim, Myongji University, Korea I.C. Hong, Myongji University, Korea S.H. Koo, Myongji University, Korea Y.J. Choi, Myongji University, Korea J.W. Kim, Myongji University, Korea Y.S. Kim, Myongji University, Korea C.J. Kang, Myongji University, Korea |
| Correspondent: | Click to Email |
Using a atomic force microscope (AFM), with conducting cantilever the current versus voltage (I-V) characteristics of difference group substituted carotenedithiol molecules are measured. The molecules are inserted into 1-methylsulfanyl-octadecane monolayer on gold surface, and a Au nanoparticle is attached to each molecule via the protruding thiol group. To measure the current a gold coated AFM probe is used to contact with the molecule through the Au nanoparticle. A self-assembled monolayer of 1-methylsulfanyl-octadecane was analyzed by the surface plasmon resonance, ellipsometry and X-ray diffraction, which were employed to identify suitable preparation conditions of the substrate. The I-V curves of two kinds of carotenedithiol molecules substituted for different end groups appear quite different because of the different electron transport properties, bromo-phenyl substituted group put a crimp in electron transport. The phenyl-substituted carotenoid is significantly more conductive than the bromo-phenyl- substituted carotenoid. In this talk, we’ll present the molecular wires possibility. The carotenoid candidate "molecular wire".