Temperature effects on the electrical conductivity of thiol encapsulated gold nanoparticle thin films

Hardy, N.; Hanwell, Marcus D.; Richardson, T.

doi:10.1007/s10854-007-9148-1

Cited by 7 publications

(9 citation statements)

References 14 publications

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“…In the case of ZnS, lms E a s of 22.5 meV and 9.1 meV were obtained corresponding to the high (>200 K) and low (<200 K) temperature regimes. The E a s reported herein are in line with previous reports 42,44 and suggest that charge transport is largely limited by the barrier present at the surface of the grains.…”

Section: Structure and Morphology Of The Depositssupporting

confidence: 92%

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Growth of nanocrystalline thin films of metal sulfides [CdS, ZnS, CuS and PbS] at the water–oil interface

et al. 2015

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Simple one pot reactions between thiobiuret complexes [M(SON(CN i Pr 2 ) 2 ) 2 ], (M ¼ Cd, Zn, Pb or Cu) in toluene and aqueous Na 2 S lead to well-defined assemblies of nanocrystals. High quality thin films of CdS, ZnS, CuS and PbS nanoparticulates adhered to the interface are produced and are transferable to glass and other substrates. The effect of reaction parameters on the nature and properties of the deposits are examined. The films are characterized by high-resolution transmission electron microscopy, X-ray diffraction, scanning electron microscopy, transport property measurements, X-ray photoelectron and absorption spectroscopy. The ability to obtain thin films of several nanocrystalline semiconductors from a single precursor set significantly expands the scope of a reaction scheme that is still in its infancy.

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Section: Structure and Morphology Of The Depositssupporting

confidence: 92%

“…Such behaviour has previously been attributed to changes in the lm structure. 42,43 An activation energy of 41.2 meV was obtained for the CdS deposits. In the case of ZnS, lms E a s of 22.5 meV and 9.1 meV were obtained corresponding to the high (>200 K) and low (<200 K) temperature regimes.…”

Section: Structure and Morphology Of The Depositsmentioning

confidence: 99%

Growth of nanocrystalline thin films of metal sulfides [CdS, ZnS, CuS and PbS] at the water–oil interface

et al. 2015

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“…The average activation energy was determined to be 2.5 meV with a standard deviation of 0.4 meV. This activation energy is an order of magnitude smaller than previously reported for gold nanoparticles [11,12], which might be caused by a reduction in the interparticle spacing observed for thiolcoated nanoparticles. Figure 3 shows a typical sensing response of the gold nanoparticle chains aligned at 0.5 and 1 MHz to various concentrations of H 2 S at room temperature.…”

Section: Doi: 101002/elan201100295mentioning

confidence: 51%

Selective and Rapid Room Temperature Detection of H₂S Using Gold Nanoparticle Chain Arrays

et al. 2011

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A novel conductometric hydrogen sulfide (H 2 S) sensor was fabricated by AC dielectrophoretic assembly of amino acid mediated grown gold nanoparticles across microfabricated gold electrodes. Excellent sensing performance toward hydrogen sulfide, including a sensitivity of 29.84 % ppm À1 , a lower detection limit in the sub-ppm level, the upper detection limit of 2 ppm, and a response time of < 20 s for 10 ppm H 2 S was achieved at room temperature. In addition, excellent selectivity was demonstrated toward CO and SO 2 with minimum interference from NH 3 . Enhanced sensor performance may be attributed to the use of amino acid capped gold nanoparticles compared to thiolated gold nanoparticles and optimized assembly conditions to control the density of gold nanoparticle chains and electron transport properties.

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“…Since Brust reported the preparation of dodecanethiol-stabilized Au NPs using a two-phase method, significant efforts have been devoted to the structure–property relationships of organosoluble Au NPs using Langmuir monolayers, − clusters, , crystalline aggregates, , and directed assembly. ,, In this study, we prepared Au NP ribbons from organosoluble Au NPs and study their morphologies and electrical properties. Interestingly, we could not prepare well-defined NP ribbons from dodecanethiol-stabilized Au NPs prepared by the standard Brust two-phase method, despite the facile formation of well-defined NP ribbons from CdSe QDs prepared by standard syntheses. , As shown below, the ligand density, nanoparticle size dispersity, and surfactant contamination should be considered for preparing well-defined Au NP ribbons.…”

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confidence: 99%

Highly Conductive Ribbons Prepared by Stick–Slip Assembly of Organosoluble Gold Nanoparticles

et al. 2014

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Precisely positioning and assembling nanoparticles (NPs) into hierarchical nanostructures is opening opportunities in a wide variety of applications. Many techniques employed to produce hierarchical micrometer and nanoscale structures are limited by complex fabrication of templates and difficulties with scalability. Here we describe the fabrication and characterization of conductive nanoparticle ribbons prepared from surfactant-free organosoluble gold nanoparticles (Au NPs). We used a flow-coating technique in a controlled, stick-slip assembly to regulate the deposition of Au NPs into densely packed, multilayered structures. This affords centimeter-scale long, high-resolution Au NP ribbons with precise periodic spacing in a rapid manner, up to 2 orders-of-magnitude finer and faster than previously reported methods. These Au NP ribbons exhibit linear ohmic response, with conductivity that varies by changing the binding headgroup of the ligands. Controlling NP percolation during sintering (e.g., by adding polymer to retard rapid NP coalescence) enables the formation of highly conductive ribbons, similar to thermally sintered conductive adhesives. Hierarchical, conductive Au NP ribbons represent a promising platform to enable opportunities in sensing, optoelectronics, and electromechanical devices.

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Temperature effects on the electrical conductivity of thiol encapsulated gold nanoparticle thin films

Cited by 7 publications

References 14 publications

Growth of nanocrystalline thin films of metal sulfides [CdS, ZnS, CuS and PbS] at the water–oil interface

Growth of nanocrystalline thin films of metal sulfides [CdS, ZnS, CuS and PbS] at the water–oil interface

Selective and Rapid Room Temperature Detection of H₂S Using Gold Nanoparticle Chain Arrays

Highly Conductive Ribbons Prepared by Stick–Slip Assembly of Organosoluble Gold Nanoparticles

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Temperature effects on the electrical conductivity of thiol encapsulated gold nanoparticle thin films

Cited by 7 publications

References 14 publications

Growth of nanocrystalline thin films of metal sulfides [CdS, ZnS, CuS and PbS] at the water–oil interface

Growth of nanocrystalline thin films of metal sulfides [CdS, ZnS, CuS and PbS] at the water–oil interface

Selective and Rapid Room Temperature Detection of H2S Using Gold Nanoparticle Chain Arrays

Highly Conductive Ribbons Prepared by Stick–Slip Assembly of Organosoluble Gold Nanoparticles

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Selective and Rapid Room Temperature Detection of H₂S Using Gold Nanoparticle Chain Arrays