Presentation Information
[2P07]Characterization and current-induced reaction of trioxosumanene/Au(111) by scanning probe microscopy
*Kohei Nishijima1, Kota Iwata1, Yuki Wada2, Ikutaro Hamada2, Hidehiro Sakurai3, Yoshiaki Sugimoto1 (1. Graduate School of Frontier Sciences, The University of Tokyo, 2. Department of Precision Engineering, Osaka University, 3. Division of Applied Chemistry, Osaka University)
Single molecules can be used as tiny switches by controlling their intrinsic properties such as conformation, dipole orientation, or spin state. Bucky-bowls, a class of curved organic molecules inherently possess a dipole moment due to their non-planar structure and have an additional structural degree of freedom, bowl-up/down. In this study, we characterized the structural and electronic properties of trioxosumanene (TOSUM) on Au(111) using scanning tunneling microscopy (STM) and atomic force microscopy (AFM). During the STM measurements, we found that TOSUM reacts via tunneling electrons at the single-molecule level. The threshold value of the bias voltage corresponds to the lowest unoccupied molecular orbital level (LUMO) of TOSUM, indicating this reaction is mediated by electron excitation process. These results suggest the potential of non-planar organic molecules adsorbed on surfaces for applications as memory devices.