Conductance values of alkanedithiol molecular junctions

González, M. Teresa; Brunner, Jan; Huber, R.; Wu, Songmei; Schönenberger, Christian; Calame, Michel

doi:10.1088/1367-2630/10/6/065018

Cited by 28 publications

(14 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to gain more insight in the nature of the P2 plateau, we also investigated the junction behavior upon closing of the gap between the electrodes. Closing conductance traces have not been widely studied since for most molecules no clear conductance features are observed 37–39 . This is usually attributed to the fact that molecules tend to lay flat on the electrode surface after the breaking of the molecular junction.…”

Section: Resultsmentioning

confidence: 99%

“…The P1 peak has a higher conductance and a larger width during the closing. This effect is attributed to the evolution of the electrodes shape through an opening/closing cycle; the electrodes are atomically sharp during opening and more blunt during closing 37 . This is a result of the surface relaxation after the breaking of the molecular junction, and least to more molecules bridging the electrodes during closing.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

In-situ formation of one-dimensional coordination polymers in molecular junctions

et al. 2019

Self Cite

View full text Add to dashboard Cite

We demonstrate the bottom-up in-situ formation of organometallic oligomer chains at the single-molecule level. The chains are formed using the mechanically controllable break junction technique operated in a liquid environment, and consist of alternating isocyano-terminated benzene monomers coordinated to gold atoms. We show that the chaining process is critically determined by the surface density of molecules. In particular, we demonstrate that by reducing the local supply of molecules within the junction, either by lowering the molecular concentration or by adding side groups, the oligomerization process can be suppressed. Our experimental results are supported by ab-initio simulations, confirming that the isocyano terminating groups display a high tendency to form molecular chains, as a result of their high affinity for gold. Our findings open the road for the controlled formation of one-dimensional, single coordination-polymer chains as promising model systems of organometallic frameworks.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In-situ formation of one-dimensional coordination polymers in molecular junctions

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…So far we have focused on the phononic contribution to the thermal conductance, and we may wonder whether the electrons play any role. Alkanes are known to be poor electrical conductors [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Thus, on the basis of the Wiedemann-Franz law [7,37], one therefore does not expect the electrons to give a significant contribution to the thermal conductance.…”

Section: Further Discussionmentioning

confidence: 99%

“…In the context of molecular junctions, the issue of the length dependence of the thermal conductance has already been addressed both experimentally and theoretically. Often, the molecules of choice have been alkane chains [16,17], which are saturated molecules whose electrical properties have been widely studied in the context of molecular electronics [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. From the experimental side, the length dependence of the thermal conductance of alkane-based molecular junctions was investigated by Wang et al [32] making use of alkanedithiol self-assembled monolayers (SAMs) that were sandwiched between Au and GaAs electrodes.…”

Section: Introductionmentioning

confidence: 99%

Length dependence of the thermal conductance of alkane-based single-molecule junctions: Anab initiostudy

et al. 2016

View full text Add to dashboard Cite

“…Multiple conductance peaks are often attributed to the formation of multiple molecular bridges connected in parallel [15,24]. The strength of the molecule–metal chemical bond is considered to play a central role in determining the single-molecule conductance values.…”

Section: Discussionmentioning

confidence: 99%

Charge transport in a zinc–porphyrin single-molecule junction

Perrin¹,

Martin²,

Prins³

et al. 2011

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

SummaryWe have investigated charge transport in ZnTPPdT–Pyr (TPPdT: 5,15-di(p-thiolphenyl)-10,20-di(p-tolyl)porphyrin) molecular junctions using the lithographic mechanically controllable break-junction (MCBJ) technique at room temperature and cryogenic temperature (6 K). We combined low-bias statistical measurements with spectroscopy of the molecular levels in the form of I(V) characteristics. This combination allows us to characterize the transport in a molecular junction in detail. This complex molecule can form different junction configurations, having an observable effect on the trace histograms and the current–voltage (I(V)) measurements. Both methods show that multiple, stable single-molecule junction configurations can be obtained by modulating the interelectrode distance. In addition we demonstrate that different ZnTPPdT–Pyr junction configurations can lead to completely different spectroscopic features with the same conductance values. We show that statistical low-bias conductance measurements should be interpreted with care, and that the combination with I(V) spectroscopy represents an essential tool for a more detailed characterization of the charge transport in a single molecule.

show abstract

Conductance values of alkanedithiol molecular junctions

Cited by 28 publications

References 24 publications

In-situ formation of one-dimensional coordination polymers in molecular junctions

In-situ formation of one-dimensional coordination polymers in molecular junctions

Length dependence of the thermal conductance of alkane-based single-molecule junctions: Anab initiostudy

Charge transport in a zinc–porphyrin single-molecule junction

Contact Info

Product

Resources

About