Abstract
The tip influence on the energy level alignment at the SnPc/Ag(111) interface has been addressed via scanning tunneling spectroscopy (STS). A collective effect characteristic for both molecular conformations up and down is reported to shift the corresponding first filled and empty levels toward the Fermi energy via a tip−sample distance decrease. The importance of the tin ion coupling to the metal electrodes is emphasized for the newly reported “cross-bending” effect as well as for a controllable tip-induced single-molecule switching and “nano-writing” within densely packed molecular arrays.
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