Conductance measurement of carboxylic acids binding to palladium nanoclusters by electrochemical jump-to-contact STM break junction

Wang, Yahao; Sun, Yanyan; Han, Di; Zheng, Jianbin; Niu, Zhen-Jiang; Zhou, Xiao‐Shun

doi:10.1016/j.electacta.2014.01.041

Cited by 33 publications

(23 citation statements)

References 62 publications

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“…Current-voltage curves can also be recorded by pausing the retraction with the molecule bridge in place. A more recent development of the STM break junction technique is the STM jump-to-contact method developed by the Mao group (26)(27)(28). In this method, a foreign metal is electrodeposited on the STM tip, and then as the tip approaches the surface under electrochemical potential control metal can be transferred to the substrate.…”

Section: Figurementioning

confidence: 99%

Single-Molecule Electronics: Chemical and Analytical Perspectives

Nichols

Higgins

2015

Annual Rev. Anal. Chem.

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It is now possible to measure the electrical properties of single molecules using a variety of techniques including scanning probe microcopies and mechanically controlled break junctions. Such measurements can be made across a wide range of environments including ambient conditions, organic liquids, ionic liquids, aqueous solutions, electrolytes, and ultra high vacuum. This has given new insights into charge transport across molecule electrical junctions, and these experimental methods have been complemented with increasingly sophisticated theory. This article reviews progress in single-molecule electronics from a chemical perspective and discusses topics such as the molecule-surface coupling in electrical junctions, chemical control, and supramolecular interactions in junctions and gating charge transport. The article concludes with an outlook regarding chemical analysis based on single-molecule conductance.

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Section: Figurementioning

confidence: 99%

Single-Molecule Electronics: Chemical and Analytical Perspectives

Nichols

Higgins

2015

Annual Rev. Anal. Chem.

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“…Since the molecule was also present in the medium, molecular contacts could be formed after rupture of the metallic contacts. Our previous studies have already proved that the single molecular conductance with nanocluster measured by the current ECSTM-BJ method is the same as that of molecule junctions with bulk metal on the tip and substrate [28]. This demonstrated that Ag-Molecule-Ag junctions were obtained.…”

Section: Results and Discussion 31 Conductance Of Dcb And Bda Contacmentioning

confidence: 58%

“…A Pt wire was used as the counter electrode, while Cu and Ag wires were used as the reference electrodes for Cu and Ag contacts, respectively. All conductance measurements were carried out on the modified Nanoscope IIIa STM (Veeco, US) [15,17,28]. The procedure of the single-molecule conductance measurement was given in detail in our previous work [28].…”

Section: Methodsmentioning

confidence: 99%

“…Another important advantage is that under electrochemical control, the Fermi levels of both tip and substrate are controlled precisely through the use of a reference electrode. It has been used to investigate carboxylic acids [15,21,27,28] and pyridines [29] with various metallic electrodes. Below, we investigate the conductance of 1,4-dicyanobenzene and 1,4-benzenediamine contacting to Ag and Cu electrodes (as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Single-molecule conductance with nitrile and amino contacts with Ag or Cu electrodes

Mao

Chen

et al. 2015

Electrochimica Acta

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“…So far, well‐studied molecular junction systems most often have symmetric configurations, for instance using molecules terminated with similar anchoring groups at each extremity of the junction, including dithiol, diamine and dicarboxylic acidetc. Likewise, the majority of single‐molecule electrical studies have used the same metal contact types on either respective side, with gold being the most common,– although other electrodes have been used such as Cu and Ag etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Asymmetric Anchoring Groups on Electronic Transport in Hybrid Metal/Molecule/Graphene Single Molecule Junctions

Zhang

Fan

et al. 2019

ChemPhysChem

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A combined experimental and theoretical study on molecular junctions with asymmetry in both the electrode type and in the anchoring group type is presented. A scanning tunnelling microscope is used to create the “asymmetric” Au‐S‐(CH2)n‐COOH‐graphene molecular junctions and determine their conductance. The measurements are combined with electron transport calculations based on density functional theory (DFT) to analyze the electrical conductance and its length attenuation factor from a series of junctions of different molecular length (n). These results show an unexpected trend with a rather high conductance and a smaller attenuation factor for the Au‐S‐(CH2)n‐COOH‐graphene configuration compared to the equivalent junction with the “symmetrical” COOH contacting using the HOOC‐(CH2)n‐COOH series. Owing to the effect of the graphene electrode, the attenuation factor is also smaller than the one obtained for Au/Au electrodes. These results are interpreted through the relative molecule/electrode couplings and molecular level alignments as determined with DFT calculations. In an asymmetric junction, the electrical current flows through the less resistive conductance channel, similarly to what is observed in the macroscopic regime.

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Conductance measurement of carboxylic acids binding to palladium nanoclusters by electrochemical jump-to-contact STM break junction

Cited by 33 publications

References 62 publications

Single-Molecule Electronics: Chemical and Analytical Perspectives

Single-Molecule Electronics: Chemical and Analytical Perspectives

Single-molecule conductance with nitrile and amino contacts with Ag or Cu electrodes

Effect of Asymmetric Anchoring Groups on Electronic Transport in Hybrid Metal/Molecule/Graphene Single Molecule Junctions

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