Direct Determination of the Energy Required to Operate a Single Molecule Switch
2003; American Physical Society; Volume: 90; Issue: 6 Linguagem: Inglês
10.1103/physrevlett.90.066107
ISSN1092-0145
AutoresCh. Loppacher, Martin Guggisberg, Olivier Pfeiffer, Ernst Meyer, M. Bammerlin, R. Lüthi, R. R. Schlittler, James K. Gimzewski, Hao Tang, Christian Joachim,
Tópico(s)Mechanical and Optical Resonators
ResumoUsing a noncontact atomic-force and scanning-tunneling microscope in ultrahigh vacuum, we have measured the switching energy of a single molecule switch based on the rotation of a di-butyl-phenyl leg in a Cu-tetra-3,5 di-tertiary-butyl-phenyl porphyrin. The mechanics and intramolecular conformation of the switched leg is controlled by the tip apex of the noncontact atomic-force microscope. The comparison between experimental and calculated force curves shows that the rotation of the leg requires an energy less than 100 x 10(-21) J, which is 4 orders of magnitude lower than state-of-the-art transistors.
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