We fabricate and characterize vertical molecular junctions consisting of self-assembled monolayers of diarylethene (DAE) contacted by a multilayer graphene (MLG) electrode on the top and gold on the bottom. The DAE molecular junctions show two stable electrical states, a closed state (high conductance) or an open state (low conductance), which are created upon illumination with UV or visible light, respectively. For the Au-DAE-MLG junction structure, we observe that the current levels between the two conductance states are separated by 2 orders of magnitude. However, in a real-time measurement, we observe only unidirectional switching behavior from the open to the closed state.
Bibliographical noteFunding Information:
The authors appreciate financial support from the National Creative Research Laboratory program (grant no. 2012026372) through the National Research Foundation of Korea funded by the Korean Ministry of Science and ICT. L.M., M.K., T.H., E.S., and F.P. gratefully acknowledge funding through the Collaborative Research Center (SFB) 767 of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation). Part of the numerical modeling was performed using the computational resources of the bwHPC program, namely the bwUniCluster and the JUSTUS HPC facility.
© 2019 American Chemical Society.
All Science Journal Classification (ASJC) codes
- Materials Science(all)