Negative differential resistance and nonclassical capacitive behaviour in networks of metal clusters

Zhang, H; Mautes, D; Hartmann, Uwe

doi:10.1088/0957-4484/18/6/065202

Cited by 5 publications

(6 citation statements)

References 19 publications

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“…The above NDC mechanism repeats itself at bias values with periodicity , with the periodicity arising from consecutive single electron (or hole) charging events in the coupled channels. This mechanism is similar in spirit to NDC induced by populations switching in SET of coupled QDs [11,17,23], where the charging level of the blocked channel increases ( Fig. 2d) at the account of that of the conducing channel ( Fig.…”

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confidence: 55%

Periodic negative differential conductance in a single metallic nanocage

et al. 2012

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We report a bi-polar multiple periodic negative differential conductance (NDC) effect on a single cage-shaped Ru nanoparticle measured using scanning tunneling spectroscopy. This phenomenon is assigned to the unique multiply-connected cage architecture providing two (or more) defined routes for charge flow through the cage. This, in turn, promotes a selfgating effect, where electron charging of one route affects charge transport along a neighboring channel, yielding a series of periodic NDC peaks. This picture is established and analyzed here by a theoretical model.

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confidence: 55%

Periodic negative differential conductance in a single metallic nanocage

et al. 2012

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“…Because there is no reason for Device 3 to contain mainly smaller NPs than those of the other devices, its G(V) spectrum originates most probably from a sub-bilayer of NPs. In order to confirm this assumption, a further study (e.g., a Monte Carlo simulation 48 ) or an experimental proof (e.g., using crosssectional transmission electron microscopy) would be needed. However, both methods are challenging for the measured devices and are out of the scope of the present work.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Electrical Properties of Hybrid Nanomembrane/Nanoparticle Heterojunctions: The Role of Inhomogeneous Arrays

Bendová¹,

Bufon

Fomin³

et al. 2016

J. Phys. Chem. C

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Investigation of charge transport mechanisms across inhomogeneous nanoparticle (NP) layers in heterojunctions is one of the key technological challenges nowadays for developing novel hybrid nanostructured functional elements. Here, we successfully demonstrate for the first time the fabrication and characterization of a novel hybrid organic/ inorganic heterojunction, which combines free-standing metallic nanomembranes with self-assembled mono-and sub-bilayers of commercially available colloidal NPs with no more than ∼10 5 NPs. The low-temperature conductance−voltage spectra exhibit Coulomb features that correlate with various interface's configurations, including the presence of inhomogeneities at the nano-and micrometer scale owing to the NP size, the micrometer-sized voids, and the thickness of the layers. The charge transport features observed can be explained by a superposition of conductance characteristics of each individual type of NPs. The procedure adopted to fabricate the heterojunctions as well as the theoretical approach employed to study the charge transport mechanisms across the NP layers may be of interest for investigating different types of NPs and commonly obtained inhomogeneous layers. In addition, the combination of metallic nanomembranes with self-assembled layers of NPs makes such a hybrid organic/inorganic heterostructure an interesting platform and building block for future nanoelectronics, especially after intentional tuning of its electronic behavior.

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“…Moreover, metal nanostructures are expected to be more robust against damage at high current loads as compared to molecules. Despite these advantages, NDR effects have rarely been reported in the electron transport through metal nanostructures, mostly for two reasons [16]. First, metal particles are often prepared on dielectric supports with low surface-free energy, where Vollmer-Weber growth guarantees the formation of compact and spatially confined aggregates [17].…”

Section: Introductionmentioning

confidence: 99%

Negative differential conductance in the electron-transport through copper-rich cuprous oxide thin films

2019

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Copper deposition onto Cu 2 O thin films grown on Au(111) results in the formation of monolayer islands with hexagonal and rhombic shapes, as observed with scanning tunnelling microscopy. The differential conductance through the Cu islands is governed by distinct quantum well states (QWS), accompanied by pronounced electron standing wave patterns. Below the onset of the QWS, an extended region of negative differential conductance opens up, in which also the tunnelling current declines markedly with increasing bias voltage. The effect is assigned to the quantised electronic structure of the Cu islands in combination with the p-type conductance behaviour of the oxide film underneath. The latter promotes electron transport across the islands around the Fermi level, but leads to a closure of this transport channel at negative bias.

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Negative differential resistance and nonclassical capacitive behaviour in networks of metal clusters

Cited by 5 publications

References 19 publications

Periodic negative differential conductance in a single metallic nanocage

Periodic negative differential conductance in a single metallic nanocage

Electrical Properties of Hybrid Nanomembrane/Nanoparticle Heterojunctions: The Role of Inhomogeneous Arrays

Negative differential conductance in the electron-transport through copper-rich cuprous oxide thin films

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