Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - An MCBJ case study: The influence of pi-conjugation on the single-molecule conductance at a solid/liquid interface
AU - Hong, Wenjing
AU - Valkenier, Hennie
AU - Meszaros, Gabor
AU - Manrique, David
AU - Mishchenko, Artem
AU - Putz, Alexander
AU - Garcia, Pavel Moreno
AU - Lambert, Colin J.
AU - Hummelen, Jan C.
AU - Wandlowski, Thomas
PY - 2011/10/18
Y1 - 2011/10/18
N2 - 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.
AB - 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.
KW - anthraquinone
KW - π-conjugation
KW - mechanically controlled break junction
KW - single-molecule conductance
U2 - 10.3762/bjnano.2.76
DO - 10.3762/bjnano.2.76
M3 - Journal article
VL - 2
SP - 699
EP - 713
JO - Beilstein Journal of Nanotechnology
JF - Beilstein Journal of Nanotechnology
SN - 2190-4286
ER -