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

Autor: Thomas Wandlowski, Pavel Moreno Garcia, Artem Mishchenko, Colin J. Lambert, Jan C. Hummelen, Alexander Putz, Gábor Mészáros, Wenjing Hong, Hennie Valkenier, David Zsolt Manrique
Přispěvatelé: Molecular Energy Materials, Stratingh Institute of Chemistry, Zernike Institute for Advanced Materials
Rok vydání: 2011
Předmět:
General Physics and Astronomy
02 engineering and technology
Conductivity
lcsh:Chemical technology
lcsh:Technology
01 natural sciences
Anthraquinone
Full Research Paper
chemistry.chemical_compound
SELF-ASSEMBLED MONOLAYERS
DEPENDENCE
CHARGE-TRANSPORT
Nanotechnology
lcsh:TP1-1185
General Materials Science
lcsh:Science
CONDUCTIVITY
Resolution (electron density)
Sciences bio-médicales et agricoles
021001 nanoscience & nanotechnology
lcsh:QC1-999
Nanoscience
Chemical physics
METAL
single-molecule conductance
pi-conjugation
ANCHORING GROUPS
anthraquinone
ddc:620
0210 nano-technology
π-conjugation
Materials science
Conjugated system
010402 general chemistry
ELECTRONICS
TUNNELING JUNCTIONS
Molecule
Electrical and Electronic Engineering
Anthracene
lcsh:T
mechanically controlled break junction
Conductance
Self-assembled monolayer
0104 chemical sciences
chemistry
lcsh:Q
ORGANIC-MOLECULES
lcsh:Physics
RESISTANCE
Zdroj: Beilstein journal of nanotechnology, 2
Beilstein Journal of Nanotechnology, 2(1), 699-713. BEILSTEIN-INSTITUT
Beilstein Journal of Nanotechnology, Vol 2, Iss 1, Pp 699-713 (2011)
Beilstein Journal of Nanotechnology
Beilstein journal of nanotechnology 2, 699-713 (2011). doi:10.3762/bjnano.2.76
ISSN: 2190-4286
DOI: 10.3762/bjnano.2.76
Popis: 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.
info:eu-repo/semantics/published
Databáze: OpenAIRE
Externí odkaz: