Gas-phase preparation and size control of Fe nanoparticles

Wang, L. S.; Wen, Rui‐Tao; Chen, Yingjun; Yue, Guanghui; Peng, Dong‐Liang; Hihara, Takehiko

doi:10.1007/s00339-011-6383-3

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…The experimental apparatus of plasma-gas-condensation (PGC)-type cluster deposition system was employed to prepare the samples. The apparatus was simply divided into three regions: a sputtering chamber, a cluster growth room and a deposition chamber 39 . The nucleation and growth of Co clusters occurred mainly in the sputtering chamber.…”

Section: Methodsmentioning

confidence: 99%

Size-dependent electrical transport properties in Co nanocluster-assembled granular films

Zhang

Wang

et al. 2017

Sci Rep

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A series of Co nanocluster-assembled films with cluster sizes ranging from 4.5 nm to 14.7 nm were prepared by the plasma-gas-condensation method. The size-dependent electrical transport properties were systematically investigated. Both of the longitudinal resistivity () and saturated anomalous Hall resistivity () continuously increased with the decrease of the cluster sizes (d). The firstly increased and then decreased with increasing the temperature for all samples, which could be well described by involving the thermally fluctuation-induced tunneling (FIT) process and scattering. The tunneling effect was verified to result in the invalidation of classical anomalous Hall effect (AHE) scaling relation. After deducting the contribution from tunneling effect to , the AHE scaling relation between and the scattering resistivity () by varying the temperature was reconstructed. The value of scaling exponent γ increased with increasing Co cluster sizes. The size dependence of γ might be qualitatively interpreted by the interface and surface-induced spin flip scattering. We also determined the scaling relation between and at 5 K by changing the Co cluster sizes, and a large value of γ = 3.6 was obtained which might be ascribed to the surface and interfacial scattering.

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Section: Methodsmentioning

confidence: 99%

Size-dependent electrical transport properties in Co nanocluster-assembled granular films

Zhang

Wang

et al. 2017

Sci Rep

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“…2d indicated that the typical diffraction peaks located at 2θ values of 40.415 o , 46.788 o and 68.423 o were attributed to (111), (200) and (220) planes of fcc Pd, respectively. Moreover, with the T S increasing, the intensity and sharpness of each typical diffraction peak became stronger, which indicated that the crystallinity of Pd NCs was enhanced and the grain size grew up due to agglomeration [12,13]. Cyclic voltammetry of nanocluster-assembled Pd films prepared at different T S are exhibited in Fig.…”

Section: Fig 1 the Schematic Diagram Of Pd Nanoclusters Deposition mentioning

confidence: 94%

“…In our previous paper, the process for the preparation of cluster-assembled films was precisely delineated (the schematic diagram is shown in Fig. 1) [12]. During deposition, a high-purity Pd (99.99 %) metal target was used as the cluster source.…”

Section: Methodsmentioning

confidence: 99%

Formic Acid Oxidation Catalytic Properties of Pd Nanoclusters Prepared by Physical Vapor Deposition

Lin¹,

Luo²,

Li³

et al. 2016

Proceedings of the 4th 2016 International Conference on Material Science and Engineering (ICMSE 2016)

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A series of narrow size distribution nanocluster-assembled Pd films with ultraclean surfaces have been synthesized by plasma-gas-condensation cluster deposition system at different substrate temperatures. The electrocatalytic oxidation of formic acid on nanoclusters-assembled Pd film were studied. Cyclic voltammetry and chronoamperometry tests revealed that Pd nanoclusters assembled film have outstanding electrocatalytic activities, including large electrochemical surface area, high current density peak of formic acid oxidation and considerable stability. Moreover, the substrate temperature was found to have an important influence to their catalytic activities.

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“…A PGCCD system (Fig. 1) was used to synthesize Pd and PdCo NCs, and the experiment principle has been described in detail in our earlier work [11] . High-purity Pd and Co (99.99%) metal targets were installed as 100 mm apart distance, and an Ar flow rate of 350 sccm adjusted by a fine mass flow controller was injected steadily into the Sputtering chamber.…”

Section: Methodsmentioning

confidence: 99%

The Improvement of Pd Nanoclusters Electro-Catalytic Properties for FAO by the Addition of Co Element

Meng

Wang

Liu

et al. 2014

AMR

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Near-monodisperse Pd and PdCo nanoclusters were synthesized by physical vapor deposition using a plasma-gas-condensation cluster deposition system and tested for catalyzing formic acid oxidation. Under the condition of high vacuum and inert gas, NCs with clean surface and uniform size were obtained. The cyclic voltammetry tests revealed that the electrochemical surface area was increased from 49.7 m2g-1to 51.7 m2g-1and the peak current density of catalyzing FAO was raised from 0.115 mA cm-2to 0.125 mA cm-2when about 12wt. % Co element was added. Additionally, the tolerance to CO poisoning of Pd could also be improved by the addition of Co. The result indicated that this method offered a chemical-free way to prepare clean and efficient Pd-based nanoscale catalytics and encouraged deeper exploration for electrochemichal catalytic reactions.

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Gas-phase preparation and size control of Fe nanoparticles

Cited by 8 publications

References 17 publications

Size-dependent electrical transport properties in Co nanocluster-assembled granular films

Size-dependent electrical transport properties in Co nanocluster-assembled granular films

Formic Acid Oxidation Catalytic Properties of Pd Nanoclusters Prepared by Physical Vapor Deposition

The Improvement of Pd Nanoclusters Electro-Catalytic Properties for FAO by the Addition of Co Element

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