Details

Autor(en) / Beteiligte

• QIU, X. H
• NAZIN, G. V
• HO, W

Titel

Mechanisms of reversible conformational transitions in a single molecule

Ist Teil von

• Physical review letters, 2004-11, Vol.93 (19), p.196806.1-196806.4, Article 196806

Ort / Verlag

Ridge, NY: American Physical Society

Erscheinungsjahr

2004

Quelle

American Physical Society

Beschreibungen/Notizen

• The reversible interconversion between two nonplanar conformations of single Zn(II) Etioporphyrin I molecules adsorbed on a NiAl(110) surface at 13 K was induced by a scanning tunneling microscope (STM). The threshold voltage for the conformational change at negative sample bias depends linearly on the tip-sample distance, suggesting an electrostatic force mechanism. The reverse conversion involves inelastic electron tunneling via a molecular electronic resonance at 1.25 eV. In contrast with the photon-induced conformational changes, an electrically induced mechanism is realized with the STM.