Specifics of low-temperature melting and disintegration into drops of silver thin films

Kitsyuk, E. P.; Громов, Д. Г.; Redichev, E. N.; Sagunova, I. V.

doi:10.1134/s2070205112030094

Cited by 9 publications

(8 citation statements)

References 16 publications

(29 reference statements)

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“…For example, a polycrystalline silver film having a 100 nm thickness deposited onto an inert fused silica substrate has a 1000 K melting temperature, compared with 1235 K for the bulk material . For a 12-nm-thick Ag film on the SiO 2 substrate the metal layer breaks into drops at approximately 500 K . Under the conditions described above, as well as the conditions used within this study, Ge segregation is more important than bulk diffusion.…”

Section: Diffusion and Segregationmentioning

confidence: 90%

Ge Wetting Layer Increases Ohmic Plasmon Losses in Ag Film Due to Segregation

Wróbel

Stefaniuk

Trzciński

et al. 2015

ACS Appl. Mater. Interfaces

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We have investigated the influence of the Ge wetting layer on both ohmic and scattering losses of a surface plasmon-polariton (SPP) wave in Ag film deposited on SiO2 substrate with an e-beam evaporator. Samples were examined by means of atomic force microscopy (AFM), spectroscopic ellipsometry (SE), two-dimensional X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and microscopic four-point probe (M4PP) sheet resistance measurements. Ag films of 100 nm thickness were deposited at 180 and 295 K directly onto the substrates with or without a Ge interlayer. In AFM scans, we confirm the fact that the commonly used Ge adhesion layer smooths the surface of Ag film and therefore reduces scattering losses of the SPP wave on surface roughness. However, our ellipsometric measurements indicate for the first time that segregation of Ge leads to a considerable increase in ohmic losses connected with a boost of the imaginary part of Ag permittivity in the 500-800 nm spectral range. Moreover, the trend develops over time, as confirmed in a series of measurements performed over an interval of three months. XPS analysis confirms the Ge segregation to the Ag free surface and most probably to grain boundaries. M4PP measurements show that the specific resistivity in Ag films evaporated on a Ge interlayer at 295 K is nearly twice as high as in layers deposited directly on a SiO2 substrate. The use of an amorphous Al2O3 overlayer prevents Ge segregation to free surface.

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Section: Diffusion and Segregationmentioning

confidence: 90%

Ge Wetting Layer Increases Ohmic Plasmon Losses in Ag Film Due to Segregation

Wróbel

Stefaniuk

Trzciński

et al. 2015

ACS Appl. Mater. Interfaces

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“…The Zn surface precipitations are expected to be very thin, not exceeding the thickness of several nm. It has been shown previously that for such thin metal layers, the melting temperature (and thus also the boiling temperature) is much lower than in the case of bulk materials [56]. This suggests that in the case of elevated substrate temperatures, the excess Zn precipitations boil or sublimate from the surface and leave the system thus forming a much thinner, though a more stoichiometric ZnO film.…”

Section: Discussionmentioning

confidence: 92%

Microstructure and Optical Properties of E-Beam Evaporated Zinc Oxide Films—Effects of Decomposition and Surface Desorption

et al. 2020

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Zinc oxide films have been fabricated by the electron beam physical vapour deposition (PVD) technique. The effect of substrate temperature during fabrication and annealing temperature (carried out in ultra high vacuum conditions) has been investigated by means of atomic force microscopy, scanning electron microscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy and spectroscopic ellipsometry. It was found that the layer deposited at room temperature is composed of Zn and ZnO crystallites with a number of orientations, whereas those grown at 100 and 200 ∘C consist of ZnO grains and exhibit privileged growth direction. Presented results clearly show the influence of ZnO decomposition and segregation of Zn atoms during evaporation and post-deposition annealing on microstructure and optical properties of zinc oxide films.

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“…Variation of melting temperature with particle diameter for spheres and a length cubes, for Gibbs-Thomsan model for spheres and cubes [12], for red spheres [12], for blue cubes [12], for Al, Pb, Ag and Sn [7] Figure 2. Variation of melting temperature with thin film of semi infinite Alumina film [12], core shell Al [17,18], Cu film [14], Ag film [19].…”

Section: Melting Temperaturementioning

confidence: 99%

“…Melting of the Figure 2. Variation of melting temperature with thin film of semi infinite Alumina film [12], core shell Al [17,18], Cu film [14], Ag film [19].…”

Section: Melting Temperaturementioning

confidence: 99%

“…Lai et al [23] showed the function of weight-average radius with melting temperature and proved the difference which was induced due to the pressure effects through the oxide layer. In addition, Kitsyunk et al defined the change of melting temperature of thin films [19]. As the thickness of the film decreases, melting temperature decreases as well.…”

Section: Melting Temperaturementioning

confidence: 99%

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Size Dependent Properties of Reactive Materials

2022

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The nature of the self-sustained reaction of reactive materials is dependent on the physical, thermal, and mechanical properties of the reacting materials. These properties behave differently at the nano scale. Low-dimensional nanomaterials have various unusual size dependent transport properties. In this review, we summarize the theoretical and experimental reports on the size effect on melting temperature, heat capacity, reaction enthalpy, and surface energy of the materials at nano scale because nanomaterials possess a significant change in large specific surface area and surface effect than the bulk materials. According to the theoretical analysis of size dependent thermodynamic properties, such as melting temperature, cohesive energy, thermal conductivity and specific heat capacity of metallic nanoparticles and ultra-thin layers varies linearly with the reciprocal of the critical dimension. The result of this scaling relation on the material properties can affect the self-sustained reaction behavior in reactive materials. Resultant, powder compacts show lower reaction propagation velocities than bilayer system, if the particle size of the reactants and the void density is decreased an increase of the reaction propagation velocity due to an enhanced heat transfer in reactive materials can be achieved. Standard theories describing the properties of reactive material systems do not include size effects.

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Specifics of low-temperature melting and disintegration into drops of silver thin films

Cited by 9 publications

References 16 publications

Ge Wetting Layer Increases Ohmic Plasmon Losses in Ag Film Due to Segregation

Ge Wetting Layer Increases Ohmic Plasmon Losses in Ag Film Due to Segregation

Microstructure and Optical Properties of E-Beam Evaporated Zinc Oxide Films—Effects of Decomposition and Surface Desorption

Size Dependent Properties of Reactive Materials

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