Role of silver nanoparticles in the dewetting behavior of copper thin films

Kumar, Krishna; Swaminathan, Parasuraman

doi:10.1016/j.tsf.2017.10.014

Cited by 14 publications

(13 citation statements)

References 39 publications

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“…RTA has many advantages over CFA such as lower dewetting temperatures of thin metal films with an increase of heating rate, lower crystallisation temperature, minimised film substrate interface reactions, shorter annealing time, better electrical properties, and reduced thermal costs [23]. According to Bergum et al [24], rapid thermal annealing of thin layers of Cu 2 O prepared using magnetron sputtering improves their carrier transport, while Kumar et al [25] reported that RTA, owing to the faster heating rates, shorter time, and lower temperatures, promotes the formation of a smaller grain size of Cu and Ag-Cu materials. Moreover, Khaoo et al [26] achieved an increase in photovoltaic performance and external quantum efficiency for ZnO/Cu 2 O by rapid thermal annealing.…”

Section: Introductionmentioning

confidence: 99%

Temperature-controlled nanomosaics of AuCu bimetallic structure towards smart light management

Lipińska

Grochowska

Karczewski

et al. 2022

J Mater Sci: Mater Electron

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Gold–copper nanostructures are promising in solar-driven processes because of their optical, photocatalytic and photoelectrochemical properties, especially those which result from the synergy between the two metals. Increasing interest in their internal structure, such as the composition or distribution of the Au and Cu as well as the size and shape of the nanoparticles, have developed to define their physicochemical properties.In this work, we present the influence of thermal treatment in temperature ranges from 100 to 600 °C on the formation process of bimetallic AuCu structures and their properties. AuCu materials were placed on nanostructured titanium foil substrates that were fabricated using electrochemical anodisation and chemical etching. Thin layers of AuCu mixture, as well as Au and Cu, were sputtered on the obtained Ti nanodimples. The materials were then annealed in a rapid thermal annealing furnace in an air atmosphere. Thermal treatment strongly affected the morphology and optical properties of the fabricated materials. AuCu NPs formed at 400 °C in titanium dimples. The material exhibits absorption of visible light in the range from c.a. 400 to 700 nm. The characterisation of the chemical nature of the samples was determined using X-ray photoelectron spectroscopy. In addition, X-ray diffraction and Raman spectroscopy defined composition and crystallinity. Based on photoelectrochemical studies carried out with the use of linear voltammetry in 0.1 M NaOH, it is possible to distinguish two types of interactions of light with the materials such as photogenerated charge accumulation and electron–hole pair separation. A 10AuCu electrode annealed at 300 °C achieved the highest current registered under illumination at − 0.17 V vs. Ag/AgCl/0.1 M KCl. The value was 11 times higher than for a non-annealed structure.

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Section: Introductionmentioning

confidence: 99%

Temperature-controlled nanomosaics of AuCu bimetallic structure towards smart light management

Lipińska

Grochowska

Karczewski

et al. 2022

J Mater Sci: Mater Electron

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“…Compared to other methods, dewetting has the advantages of large area coverage, low cost and production of ordered NPs. Furthermore, the rapid thermal treatment of thin Ag/Cu bilayers also enables the production of composite Ag-Cu nanoparticles [22]. However, the high melting temperatures of most metals are not easily achievable using conventional heating methods.…”

Section: Introductionmentioning

confidence: 99%

Antifungal Properties of Pure Silver Films with Nanoparticles Induced by Pulsed-Laser Dewetting Process

Lin

Wang

et al. 2020

Applied Sciences

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Silver particles were prepared by dewetting Ag films coated on glass using a fiber laser. The size of the particles was controlled in the range of 92 nm–1.2 μm by adjusting the thickness of the Ag film. The structural properties and surface roughness of the particles were evaluated by means of scanning electron microscopy. In addition, the antifungal activity of the Ag particles was examined using spore suspensions of Colletotrichum gloeosporioides. It is shown that particles with a size of 1.2 μm achieved 100% inhibition of conidia growth of C. gloeosporioides after a contact time of just 5 min. Furthermore, the smaller particles also achieved good antifungal activity given a longer contact time. Similar results were observed for spore germination and pathogenicity tests performed on mango fruit and leaves. Overall, the results confirm that Ag particles have an excellent antifungal effect on C. gloeosporioides.

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“…Dewetting is normally considered detrimental as it limits the thermal stability of films [5]. There are also applications, primarily to synthesize nanoparticle arrays by dewetting, with or without patterning [6][7][8][9][10][11][12][13][14][15]. Recently, we had reported on the synthesis of Cu-Ag bimetallic nanoparticles, by solid-state dewetting, which were used as etch masks to fabricate dual-diameter silica nanopillars for antireflection coating applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanoparticles on the dewetting of bismuth films

Kumar

Kavuri

Swaminathan

2020

Surface Engineering

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We report on the effect of metallic nanoparticles on the liquid-state dewetting behaviour of bismuth films. The nanoparticles and the films were grown by thermal evaporation and subjected to annealing under ambient conditions. Dewetting was analysed by morphological studies of TEM images and by calculating the surface exposure of the films. Our results show that the addition of Ag and Au destabilizes the film, while Cu has the opposite effect. This is explained by the formation of solid solutions for Bi-Au and Bi-Ag, which lower the melting point. Cu nanoparticles stabilize the film by pinning the dewetting front. This mechanism is different from solid-state dewetting where stabilization is due to the reduction in pinhole formation at the grain and triple boundaries. This study provides insight into the role of nanoparticles on the stability of metallic films and can be extended to other low melting metallic systems.

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Role of silver nanoparticles in the dewetting behavior of copper thin films

Cited by 14 publications

References 39 publications

Temperature-controlled nanomosaics of AuCu bimetallic structure towards smart light management

Temperature-controlled nanomosaics of AuCu bimetallic structure towards smart light management

Antifungal Properties of Pure Silver Films with Nanoparticles Induced by Pulsed-Laser Dewetting Process

Effect of nanoparticles on the dewetting of bismuth films

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