Journal Article10.1002/CHEM.201003507
A Core‐Shell Strategy for Constructing a Single‐Molecule Junction
Lejia Wang,Kai-Ge Zhou,Lin Tan,Hong Wang,Zi-Fa Shi,Guo-Ping Wu,Zhu-Guo Xu,Xiao-Ping Cao,Huixin He,Hao-Li Zhang +9 more
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TL;DR: It is demonstrated that the dendrimer-based core-shell strategy allows the single-molecule conductance to be probed in a homogenous monolayer without the influence of intermolecular π-π interactions.
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Abstract: Understanding the effects of intermolecular interactions on the charge-transport properties of metal/ molecule/metal junctions is an impor- tant step towards using individual mol- ecules as building blocks for electronic devices. This work reports a systematic electron-transport investigation on a series of "core-shell"-structured oligo(- phenylene ethynylene) (Gn-OPE) mo- lecular wires. By using dendrimers of different generations as insulating "shells", the intermolecular p-p inter- actions between the OPE "cores" can be precisely controlled in single-com- ponent monolayers. Three techniques are used to evaluate the electron-trans- port properties of the Au/Gn-OPE/Au molecular junctions, including crossed- wire junction, scanning tunneling spec- troscopy (STS), and scanning tunneling microscope (STM) break-junction tech- niques. The STM break-junction mea- surement reveals that the electron- transport pathways are strongly affect- ed by the size of the side groups. When the side groups are small, electron transport could occur through three pathways, including through single- molecule junctions, double-molecule junctions, and molecular bridges be- tween adjacent molecules formed by aromatic p-p coupling. The dendrimer shells effectively prohibit the p-p cou- pling effect, but at the same time, very large dendrimer side groups may hinder the formation of AuS bonds. A first-generation dendrimer acts as an optimal shell that only allows electron transport through the single-molecule junction pathway, and forbids the other undesired pathways. It is demonstrated that the dendrimer-based core-shell strategy allows the single-molecule conductance to be probed in a homo- genous monolayer without the influ- ence of intermolecular p-p interac- tions.
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References
•Book
Practical surface analysis: By auger and x-ray photoelectron spectroscopy
David Briggs,M. P. Seah +1 more
- 01 Jan 1983
4.7K
Two-dimensional charge transport in self-organized, high-mobility conjugated polymers
Henning Sirringhaus,Peter J. Brown,Richard H. Friend,Martin Nielsen,Klaus Bechgaard,B.M.W. Langeveld-Voss,A. J. H. Spiering,René A. J. Janssen,E. W. Meijer,P. T. Herwig,Dago M. de Leeuw +10 more
TL;DR: In this article, the authors used thin-film, field effect transistor structures to probe the transport properties of the ordered microcrystalline domains in the conjugated polymer poly(3-hexylthiophene), P3HT.
4.6K
Large On-Off Ratios and Negative Differential Resistance in a Molecular Electronic Device.
TL;DR: A molecule containing a nitroamine redox center was used in the active self-assembled monolayer in an electronic device that exhibited negative differential resistance and an on-off peak-to-valley ratio in excess of 1000:1.
2.5K
Measurement of Single-Molecule Resistance by Repeated Formation of Molecular Junctions
Bingqian Xu,Nongjian Tao +1 more
TL;DR: The conductance of a single molecule connected to two gold electrodes was determined by repeatedly forming thousands of gold-molecule-gold junctions using conductance histograms, which revealed well-defined peaks at integer multiples of a fundamental conductance value.
2.2K