Ageing of dealloyed copper

Tomsett, Alan; Young, David J.; Stammbach, Marc R.; Wainwright, Mark

doi:10.1007/bf00582489

Cited by 16 publications

(7 citation statements)

References 16 publications

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“…35,36 The morphology of typical de-alloyed structures consists of a highly tortuous, completely interconnected porosity with a pore diameter as small as 3 nm. The structure can be coarsened to larger length scales (up to micrometers) at elevated temperatures 1 and has been shown to coarsen at room temperature (to size scales as large as a few 100 nm in the case of Au) 16,[18][19][20][21]37 as a function of the applied voltage 16,20 and electrolyte composition. 15 From an applications viewpoint, the question remains, "How universal is this behavior?"…”

Section: Introductionmentioning

confidence: 99%

Formation of nanoporous platinum by selective dissolution of Cu from Cu_0.75Pt_0.25

2003

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This paper gives results demonstrating the production of nanoporous platinum through the de-alloying of Cu0.75Pt0.25alloy in 1 M H2SO4. Both field emission scanning electron microscopy and small angle neutron scattering confirm the presence of porosity with a diameter of approximately 3.4 nm. This is the smallest porosity quantitatively reported from a de-alloying process to date. The small size is attributed to the extremely small values of surface diffusivity expected for Pt at room temperature, effectively eliminating room-temperature coarsening processes. The results also show that larger length scales can be achieved through coarsening at elevated temperatures. The ease of production of porous platinum makes it attractive for possible applications, such as high surface area electrodes for biomedical devices or as catalyst materials.

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Section: Introductionmentioning

confidence: 99%

Formation of nanoporous platinum by selective dissolution of Cu from Cu_0.75Pt_0.25

2003

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“…A three-dimensional visualization of the nanostructure is generated from small angle experiments and the lattice parameter is derived from diffraction. 9 The rate of coarsening can be accelerated via a post-dealloying heat treatment, 1,7 increased exposure to the electrolyte, 6,10,11 or by the addition of surface-diffusion enhancing anions to the dealloying solution. We interpret this by considering regions of high positive and negative curvatures in the material; this curvature decreases with increasing pore size resulting in a relaxation in lattice strain.…”

mentioning

confidence: 99%

Strain development in nanoporous metallic foils formed by dealloying

Schofield

Ingham²,

Turnbull

et al. 2008

Applied Physics Letters

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Articles you may be interested inStructural features and high quasi-static strain rate sensitivity of Au49Cu26.9Ag5.5Pd2.3Si16.3 bulk metallic glass Appl. Phys. Lett. 101, 241905 (2012); 10.1063/1.4770072 Morphology and porosity of nanoporous Au thin films formed by dealloying of AuxSi1−x J. Appl. Phys. 112, 094320 (2012); 10.1063/1.4764906 Morphological and topological analysis of coarsened nanoporous gold by x-ray nanotomography Appl. Phys. Lett. 96, 043122 (2010); 10.1063/1.3285175 Fabrication of metallic nanoporous films by dealloying

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“…Another study by Tomsett et al 26 showed the change of the pore size with time for Cu-Al systems. By removing the alloy from the solution at varying dealloying times a clear variation in pore size was observed.…”

Section: Stability Of Poresmentioning

confidence: 95%

Reviews in Modern Surface Finishing No.1: Anodic routes to nanoporous materials

Schofield¹

2005

Transactions of the IMF

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The formation and application of nanoscale materials is revolutionising many industrial sectors. The unique properties and functionality offered at this length scale are attractive and the demand for new materials and new production routes is high. This challenging field of research incorporates materials science, engineering and advanced characterisation techniques. The range of materials that are produced at the nanoscale is increasing rapidly; this review will focus specifically on the generation of nanoporous materials from anodic electrochemical routes. The method of dealloying as a route to the formation of nanoporous materials in terms of the processing, alteration and potential applications will be discussed. Factors such as alloy composition, electrolyte and applied potential are all seen to be critical factors on the resultant morphology. This method will then be compared with other available electrochemical routes to form nanoporous materials. It is seen that irrespective of the synthesis employed, the manufacturing method plays an important role on the characteristics of the pore formation in terms of the resultant morphologies and the properties they exhibit.

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Ageing of dealloyed copper

Cited by 16 publications

References 16 publications

Formation of nanoporous platinum by selective dissolution of Cu from Cu_0.75Pt_0.25

Formation of nanoporous platinum by selective dissolution of Cu from Cu_0.75Pt_0.25

Strain development in nanoporous metallic foils formed by dealloying

Reviews in Modern Surface Finishing No.1: Anodic routes to nanoporous materials

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Ageing of dealloyed copper

Cited by 16 publications

References 16 publications

Formation of nanoporous platinum by selective dissolution of Cu from Cu0.75Pt0.25

Formation of nanoporous platinum by selective dissolution of Cu from Cu0.75Pt0.25

Strain development in nanoporous metallic foils formed by dealloying

Reviews in Modern Surface Finishing No.1: Anodic routes to nanoporous materials

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Formation of nanoporous platinum by selective dissolution of Cu from Cu_0.75Pt_0.25

Formation of nanoporous platinum by selective dissolution of Cu from Cu_0.75Pt_0.25