| AVS 55th International Symposium & Exhibition | |
| Electronic Materials and Processing | Wednesday Sessions |
| Session EM+NC-WeA |
| Session: | Molecular and Organic Electronics |
| Presenter: | S.U. Nanayakkara, University of Pennsylvania |
| Authors: | S.U. Nanayakkara, University of Pennsylvania L. Kraya, University of Pennsylvania T.-H. Park, Duke University J.T. Stecher, Duke University M.J. Therien, Duke University D.A. Bonnell, University of Pennsylvania |
| Correspondent: | Click to Email |
We have measured charge transport in individual porphyrin-chromophore molecules using an ultra-high vacuum scanning tunneling microscope. This class of fully conjugated molecules can include a mono- or multi-chromophoric center and a linker-group that terminates with a thiol or dithioate functionality. These functionalities facilitate attachment to a gold substrate. Therefore, in order to isolate individual and small groups of molecules we have utilized self- and directed-assembly using alkanethiolate self-assembled monolayers (SAMs) on Au(111). The alkanethiolate SAMs provide a support matrix confining the porphyrin-chromophore molecules into precise assemblies for charge transport measurements. We have further coupled a laser to the tunneling junction in order to record photo-induced single molecule charge transport measurements. We aim to understand the conductance pathways of these molecules with and without illumination, and as a function of its chemical structure and the molecule-substrate interface.