par Hong, Wenjing;Valkenier, Hennie ;Mészáros, Gábor;Manrique, David Zsolt;Mishchenko, Artem;Putz, Alexander;Moreno-García, Pavel;Lambert, Colin;Hummelen, Jan;Wandlowski, Thomas
Référence Beilstein journal of nanotechnology, 2, page (699-713)
Publication Publié, 2011
Référence Beilstein journal of nanotechnology, 2, page (699-713)
Publication Publié, 2011
Article révisé par les pairs
Résumé : | π-Conjugation plays an important role in charge transport through single molecular junctions. We describe in this paper the construction of a mechanically controlled break-junction setup (MCBJ) equipped with a highly sensitive log I-V converter in order to measure ultralow conductances of molecular rods trapped between two gold leads. The current resolution of the setup reaches down to 10 fA. We report single-molecule conductance measurements of an anthracene-based linearly conjugated molecule (AC), of an anthraquinone-based cross-conjugated molecule (AQ), and of a dihydroanthracene-based molecule (AH) with a broken conjugation. The quantitative analysis of complementary current-distance and current-voltage measurements revealed details of the influence of π-conjugation on the single-molecule conductance. |