An MCBJ case study: The influence of pi-conjugation on the single-molecule conductance at a solid/liquid interface

Hong, Wenjing and Valkenier, Hennie and Meszaros, Gabor and Manrique, David and Mishchenko, Artem and Putz, Alexander and Garcia, Pavel Moreno and Lambert, Colin J. and Hummelen, Jan C. and Wandlowski, Thomas (2011) An MCBJ case study: The influence of pi-conjugation on the single-molecule conductance at a solid/liquid interface. Beilstein Journal of Nanotechnology, 2. pp. 699-713. ISSN 2190-4286

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Abstract

pi-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 p-conjugation on the single-molecule conductance.

Item Type:
Journal Article
Journal or Publication Title:
Beilstein Journal of Nanotechnology
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57840
Deposited By:
Deposited On:
28 Aug 2012 13:41
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Aug 2020 02:38