Noise characterization of metal-single molecule contacts

Dong, Xiaopeng; Sydoruk, V. A.; Vitusevich, S. А.; Petrychuk, M. V.; Offenhäusser, Andreas; Kochelap, V. A.; Belyaev, A. E.; Mayer, Dirk

doi:10.1063/1.4908252

Cited by 23 publications

(26 citation statements)

References 20 publications

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“…[28][29][30] More recently, noise measurements were also applied to molecular junctions. [31][32][33][34][35][36][37][38][39] At room temperature, the dominant noise source in a molecular junction originates from the movement of atoms on the metal electrodes which lead to a fluctuation of the molecule-electrode coupling and hence the measured conductance. 36 The resulting conductance noise power spectrum shows a 1/f n frequency dependence, this type of noise is often referred to as flicker noise or 1/f noise.…”

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confidence: 99%

Electronic and mechanical characteristics of stacked dimer molecular junctions

et al. 2018

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Break-junction measurements are typically aimed at characterizing electronic properties of single molecules bound between two metal electrodes. Although these measurements have provided structure-function relationships for such devices, there is little work that studies the impact of molecule-molecule interactions on junction characteristics. Here, we use a scanning tunneling microscope based break-junction technique to study pi-stacked dimer junctions formed with two amine-terminated conjugated molecules. We show that the conductance, force and flicker noise of such dimers differ dramatically when compared with the corresponding monomer junctions and discuss the implications of these results on intra- and inter-molecular charge transport.

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confidence: 99%

Electronic and mechanical characteristics of stacked dimer molecular junctions

et al. 2018

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“…In the cases of more stable metal-moleculemetal systems (without bond breakings) it was revealed that RTS noise originates from the current induced reconfigurations of the molecule. 19 On the other hand flicker noise component is important and has to be analyzed. It may have relatively high amplitude and compete with RTS noise component, therefore 1/f noise has to be analyzed in molecule containing junctions and compared with the case of molecule-free junctions.…”

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confidence: 99%

Noise spectroscopy of tunable nanoconstrictions: molecule-free and molecule-modified

Handziuk

Gasparyan

Vandamme³

et al. 2018

Nanotechnology

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Devices with metallic nanoconstrictions functionalized by organic molecules are promising candidates for the role of functional devices in molecular electronics. However, at the moment little is known about transport and noise properties of nanoconstriction devices of this kind. In this paper, transport properties of bare gold and molecule-containing tunable cross-section nanoconstrictions are studied using low-frequency noise spectroscopy. Normalized noise power spectral density (PSD) S /I dependencies are analyzed for a wide range of sample resistances R from 10 Ohm to 10 MOhm. The peculiarities and physical background of the flicker noise behavior in the low-bias regime are studied. It is shown that modification of the sample surface with benzene-1,4-dithiol molecules results in a decrease of the normalized flicker noise spectral density level in the ballistic regime of sample conductance. The characteristic power dependence of normalized noise PSD as a function of system resistance is revealed. Models describing noise behavior for bare gold and BDT modified samples are developed and compared with the experimental data for three transport regimes: diffusive, ballistic and tunneling. Parameters extracted from models by fitting are used for the characterization of nanoconstriction devices.

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“…As shown in Figure a, the researchers obtained an accurate GR noise spectrum from at least three different MCBJ chips. [ 45 ] This voltage noise power spectral density was obtained from a lock‐in state junction of 1,4‐benzenedithiol (BDT) molecule and contains a 1/ f component and a 1/ f 2 component. This curve can be fit by the following formula

\begin{matrix} S_{v} (f) = \frac{A}{f} + \frac{B}{1 + {(f / f_{0})}^{2}} + 4 k_{normalB} T R \end{matrix}

where A and B represent the amplitudes of two types of the noise, k B is the Boltzmann constant, T is the ambient temperature, R is the resistance, and f 0 is the characteristic frequency derived from the inflection position of the total noise spectra, which corresponds to the pink arrow in Figure 5a.…”

Section: Progress In the Characterization Of Electronic Noise In Molementioning

confidence: 99%

“…Reproduced with permission. [ 45 ] Copyright 2015, American Institute of Physics. c) The thermal activated conductance on temperature for an Au–BDA–Au molecular junction, ∆ x represents the change of the gap width, τ e and τ c are marked as RTS emission and capture times.…”

Section: Progress In the Characterization Of Electronic Noise In Molementioning

confidence: 99%

The Characterization of Electronic Noise in the Charge Transport through Single‐Molecule Junctions

et al. 2020

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With the goal of creating single‐molecule devices and integrating them into circuits, the emergence of single‐molecule electronics provides various techniques for the fabrication of single‐molecule junctions and the investigation of charge transport through such junctions. Among the techniques for characterization of charge transport through molecular junctions, electronic noise characterization is an effective strategy with which issues from molecule–electrode interfaces, mechanisms of charge transport, and changes in junction configurations are studied. Electronic noise analysis in single‐molecule junctions can be used to identify molecular conformations and even monitor reaction kinetics. This review summarizes the various types of electronic noise that have been characterized during single‐molecule electrical detection, including the functions of random telegraph signal (RTS) noise, flicker noise, shot noise, and their corresponding applications, which provide some guidelines for the future application of these techniques to problems of charge transport through single‐molecule junctions.

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Noise characterization of metal-single molecule contacts

Cited by 23 publications

References 20 publications

Electronic and mechanical characteristics of stacked dimer molecular junctions

Electronic and mechanical characteristics of stacked dimer molecular junctions

Noise spectroscopy of tunable nanoconstrictions: molecule-free and molecule-modified

The Characterization of Electronic Noise in the Charge Transport through Single‐Molecule Junctions

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