Single electron charging effects in gold nanoclusters on alkanedithiol layers with different molecular lengths

Ohgi, Taizo; Fujita, Daisuke

doi:10.1016/s0039-6028(03)00143-2

Cited by 23 publications

(27 citation statements)

References 8 publications

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“…10b, 1 and 2) illustrate a positive correlation between the current magnitude and the diameter of Au particles, and the relevant dI/dV curves (not in figures) have clear minimum near the bias offset. These findings could be explained in terms of Coulomb blockade effects typical for ultrafine gold particles (Ohgi and Fujita, 2003;Daniel and Astruc, 2004 and references herein), when arising electric charge of a particle retards electron transfer in a junction with a very small capacitance. The physics underlying the charging effects is similar in photoelectron spectroscopy and tunneling spectroscopy, so the high-energy shifts of XPS Au 4f lines and the suppression of tunneling currents in STS appear to have the same origin.…”

Section: Gold Deposition On Arsenopyritementioning

confidence: 81%

“…A share of Au(I) is minor, but it increases with diminishing the total amount of precipitated gold. An increase in the binding energies of metallic gold with decreasing particle size (see also Mycroft et al, 1995;Maddox et al, 1998 and reference herein) appears to be a consequence of a temporal charging of the nanoparticle due to the photoionization process, lessening kinetic energies of the photoelectrons by interaction with holes formed on the Au nanoparticles in final state (Hö vel et al, 1998;Ohgi and Fujita, 2003;Boyen et al, 2005). However, the dimension of the gold clusters supported on other substrates was commonly less than 5 nm, while the Au particles on arsenopyrite are notably larger.…”

Section: Gold Deposition On Arsenopyritementioning

confidence: 87%

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Oxidation of arsenopyrite and deposition of gold on the oxidized surfaces: A scanning probe microscopy, tunneling spectroscopy and XPS study

Mikhlin

Romanchenko

Asanov

2006

Geochimica et Cosmochimica Acta

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Section: Gold Deposition On Arsenopyritementioning

confidence: 81%

Section: Gold Deposition On Arsenopyritementioning

confidence: 87%

Oxidation of arsenopyrite and deposition of gold on the oxidized surfaces: A scanning probe microscopy, tunneling spectroscopy and XPS study

Mikhlin

Romanchenko

Asanov

2006

Geochimica et Cosmochimica Acta

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“…For presentation purposes, the curves are shifted slightly in a vertical direction. In experiments, the current gap width ∆Vg is 0.55 ± 0.1 eV at T = 30 [40] and 300 K [6].…”

Section: Resultsmentioning

confidence: 94%

“…(In Refs. [5,6] cluster sizes are given in terms of monolayer numbers; therefore, we used normalized curve from Fig. 1 of Ref.…”

Section: Resultsmentioning

confidence: 99%

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Effects of level broadening and electron overheating in tunneling structures based on metal clusters

Babich

Погосов

2010

Phys. Solid State

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We study the influence of energy levels broadening and electron subsystem overheating in island electrode (cluster) on current-voltage characteristics of three-electrode structure. A calculation scheme for broadening effect in one-dimensional case is suggested. Estimation of broadening is performed for electron levels in disc-like and spherical gold clusters. Within the two-temperature model of metallic cluster and by using a size dependence of the Debye frequency the effective electron temperature as a function of bias voltage is found approximately. We suggest that the effects of broadening and electron overheating are responsible for the strong smoothing of currentvoltage curves, which is observed experimentally at low temperatures in structures based on clusters consisting of accountable number of atoms.

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Grafted 2D Assembly of Colloidal Metal Nanoparticles for Application as a Variable Capacitor

et al. 2007

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2D assemblies of monodisperse metal particles with controlled size in the nanometer range show considerable advantages in various applications of nanophysics: surface-plasmon resonance, [1] magnetic properties for ultrahigh-density media storage, [2] transport properties, [3] and for electronic devices, such as new flash memories, [4] and chemical sensors. [5] For all these solid-state applications, chemical synthesis has proven to lead to a very good control of particle size and shape. Moreover, the chemical synthesis of nanoparticles has the advantages of simplicity and low cost with respect to physical approaches. Monodisperse metal particles with a mean size tailored in the nanometer range can be produced by several chemical reactions, such as the reduction of metal salts or the decomposition of organometallic precursors.[6] Furthermore, 3D and 2D superlattices were produced from a solution of coated metal particles with surfactants after evaporation of the solvent. [7] The organization of such particle arrays depends on several factors such as the length of the alkyl chain and the nature of the surface on which the particles are deposited. Long-range ordered 2D arrays of alkanethiolate-coated gold nanoparticles have been obtained on a silicon nitride membrane, however, an excess of thiol and a slow evaporation rate are needed. [8] Even without the excess of organic molecules that may be inappropriate for some applications, it generally remains difficult to obtain reproducible 2D dense arrays of nanoparticles without the local formation of 3D aggregates. An alternative way to get 2D arrays consists of grafting nanoparticles on chemically modified surfaces. The silanization of oxide surfaces with amino-or mercapto-silane is one of the most studied methods for this purpose.[9] The covalent immobilization of gold colloids onto self-assembled monolayers (SAMs) has also been proposed.[10] Metal nanoparticles/polyelectrolyte ultrathin films can be grown as well by layer-by-layer self-assembly methods through electrostatic interactions.[11]Several studies dealing with the electrochemical properties of coated metal nanoparticles in solution showed that monodispersed alkanethiolate-protected gold nanoparticles exhibited quantized charging characteristics.[12] Such molecular-like capacitor characteristics were observed for other metals provided very small particle mean size and very low standard deviation of the size distribution were obtained.[13] Conversely, only very few studies deal with the use of metal nanoparticles prepared by chemistry for the elaboration of solid-state devices. We report a new application of 2D assemblies of metal nanoparticles in the field of electronics. We describe the elaboration and the transport properties of junctions, the structure of which is given in Figure 1. It consists of a 2D assembly of conducting nanoparticles embedded in a thin insulating layer of a plane capacitor. The left dielectric barrier is thin enough to allow a tunnel current to pass through when the DC voltage is a...

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Single electron charging effects in gold nanoclusters on alkanedithiol layers with different molecular lengths

Cited by 23 publications

References 8 publications

Oxidation of arsenopyrite and deposition of gold on the oxidized surfaces: A scanning probe microscopy, tunneling spectroscopy and XPS study

Oxidation of arsenopyrite and deposition of gold on the oxidized surfaces: A scanning probe microscopy, tunneling spectroscopy and XPS study

Effects of level broadening and electron overheating in tunneling structures based on metal clusters

Grafted 2D Assembly of Colloidal Metal Nanoparticles for Application as a Variable Capacitor

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