Microwave assisted low temperature encapsulation of Ag films by Cu reactions using Ag–Cu alloy structures

Das, Sayantan; Alford, Terry

doi:10.1016/j.matlet.2012.08.075

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Previously, we have reported low temperature encapsulation of Ag films by copper oxides on Si using MW annealing technique. 6 Over the years, these electromagnetic waves have gained more and more importance recently in low temperature and quicker processing of materials with improved properties compared to conventional annealing techniques. Because of the photocatalytic properties of Ag/CuO nanocomposites reported by Wang et al, 7 we also anticipate the use of Agdoped CuO thin film coating on flexible solar panels with photocatalytic properties to decompose complex dirt particles.…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of Ag-doped copper oxide thin films on polyethylene napthalate substrate prepared by low temperature microwave annealing

Das

Alford

2013

Journal of Applied Physics

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Characterization of the physical and electrical properties of Indium tin oxide on polyethylene napthalate J. Appl. Phys. 98, 083705 (2005) Silver doped cupric oxide thin films are prepared on polyethylene naphthalate (flexible polymer) substrates. Thin films Ag-doped CuO are deposited on the substrate by co-sputtering followed by microwave assisted oxidation of the metal films. The low temperature tolerance of the polymer substrates led to the search for innovative low temperature processing techniques. Cupric oxide is a p-type semiconductor with an indirect band gap and is used as selective absorption layer solar cells. X-ray diffraction identifies the CuO phases. Rutherford backscattering spectrometry measurements confirm the stoichiometry of each copper oxide formed. The surface morphology is determined by atomic force microscopy. The microstructural properties such as crystallite size and the microstrain for (À111) and (111) planes are calculated and discussed. Incorporation of Ag led to the lowering of band gap in CuO. Consequently, it is determined that Ag addition has a strong effect on the structural, morphological, surface, and optical properties of CuO grown on flexible substrates by microwave annealing. Tauc's plot is used to determine the optical band gap of CuO and Ag doped CuO films. The values of the indirect and direct band gap for CuO are found to be 2.02 eV and 3.19 eV, respectively. V C 2013 AIP Publishing LLC. [http://dx

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Section: Introductionmentioning

confidence: 99%

Structural and optical properties of Ag-doped copper oxide thin films on polyethylene napthalate substrate prepared by low temperature microwave annealing

Das

Alford

2013

Journal of Applied Physics

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“…The synthesis of CuAg was achieved using different techniques such as laser cladding [13], blasting [1], microwaves [14], ball milling [15], chemical vapour deposition [16], pulsed laser deposition [17], wet chemical method [18], ion beam mixing [19], and electrodeposition (ED) [7,20]. The ED technique has many potential advantages over the other techniques mentioned above, including the ability to deposit nanocrystalline coatings at a low cost, the ability to produce compact pore-free dense coatings, crystal particle size, microstructure, and roughness [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Synthesis of Nanocrystalline CuAg Coatings on Stainless Steel from Cyanide-Free Electrolyte

et al. 2022

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Herein we demonstrate a novel plating bath, free from cyanide, to plate a highly adherent nanocrystalline copper-silver (ncCuAg) coating on a stainless-steel substrate and its application as an antimicrobial coating. The microstructures, such as the grain size, texture, microstrain, and the crystalline preferential orientation of CuAg deposits, are systematically investigated by X-ray diffraction analysis. The range of 13.4–16.6 nm was discovered to be the crystallite size determined from the X-ray peak broadening (Scherrer’s formula). Both HRTEM, FESEM-EDS, XPS, and mapping analysis revealed that the ncCuAg coatings are composed of both Ag and Cu atoms. Electrochemical processes occurring during CuAg co-deposition were investigated by using linear sweep voltammetry (LSV), cyclic voltammetry (CV), and anodic linear stripping voltammetry (ALSV). Additionally, the coatings made of ncCuAg produced by these baths work well as antibacterial agents against gram-positive (Staphylococcus) and gram-negative bacteria (Escherichia coli).

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“…However, the surface treatment of copper particles is not only complicated but also possible to lose the electrical characteristics and the thermal stabilities of the Cu@Ag particles [12, 13]. In general, increasing the Ag content of Cu@Ag nanoparticle can reduce the impact of surface treatment of copper particles, but it costs lots of silver [14, 15]. Thus, the development of a simple and low‐cost method for fabricating Cu@Ag core–shell nanoparticles is significant.…”

Section: Introductionmentioning

confidence: 99%

One‐step synthesis of oxidation‐resistant Cu@Ag core–shell nanoparticles

Yao

Xia

Chen

et al. 2018

Micro & Nano Letters

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One-step synthesis of wet chemical method is proposed for the preparation of core-shell nanostructures of copper and silver. This facile and environment friendly fabrication simplifies the surface treatment of copper particles to avoid copper core to be oxidised before coating silver. The thermal stability against oxidation and electrical properties of Cu@Ag core-shell nanoparticles are investigated. The results show that Cu@Ag core-shell nanoparticles possess high spherical degree, and the silver is evenly coated on the surface of copper nanoparticles. The synthesised spherical Cu@Ag core-shell nanoparticles exhibit excellent thermal stability at the high temperature of 300°C. After annealing at 200°C for 30 min, the sheet resistance of the spherical Cu@Ag core-shell nanoparticles (Ag content 7.68 wt%) is extremely low (69.82 μΩ cm).

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Microwave assisted low temperature encapsulation of Ag films by Cu reactions using Ag–Cu alloy structures

Cited by 5 publications

References 11 publications

Structural and optical properties of Ag-doped copper oxide thin films on polyethylene napthalate substrate prepared by low temperature microwave annealing

Structural and optical properties of Ag-doped copper oxide thin films on polyethylene napthalate substrate prepared by low temperature microwave annealing

Electrochemical Synthesis of Nanocrystalline CuAg Coatings on Stainless Steel from Cyanide-Free Electrolyte

One‐step synthesis of oxidation‐resistant Cu@Ag core–shell nanoparticles

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