Theoretical and experimental study of metastable solid solutions and phase stability within the immiscible Ag-Mo binary system

Sarakinos, Kostas; Greczyński, Grzegorz; Elofsson, Viktor; Magnfält, Daniel; Högberg, Hans; Alling, Björn

doi:10.1063/1.4942840

Cited by 15 publications

(11 citation statements)

References 53 publications

(52 reference statements)

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“…The Mo-Ag alloy films were deposited on flexible PI substrate by DC magnetron sputtering(Figure 1-I). Considering that the Mo and Ag are immiscible at room temperature[38] and the initial Mo-Ag alloy film will be in a metastable state, the Mo-Ag alloy films form a stable structure through atoms diffusion along the surface and grain boundaries under the relaxation of residual stress and distortion energy[39]. As a result, a large amount of the Ag nanoparticles were self-formed on the surface of the Mo-Ag alloy film by adjusting the Ag content.…”

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confidence: 99%

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Lian

Sun

et al. 2020

Nanotechnology Reviews

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Ag nanoparticles/Mo–Ag alloy films with different Ag contents were prepared on polyimide by magnetron sputtering. The effects of Ag contents on the microstructure of self-grown Ag nanoparticles/Mo–Ag alloy films were investigated using XRD, FESEM, EDS and TEM. The Ag content plays an important role in the size and number of uniformly distributed Ag nanoparticles spontaneously formed on the Mo–Ag alloy film surface, and the morphology of the self-grown Ag nanoparticles has changed significantly. Additionally, it is worth noting that the Ag nanoparticles/Mo–Ag alloy films covered by a thin Ag film exhibits highly sensitive surface-enhanced Raman scattering (SERS) performance. The electric field distributions were calculated using finite-difference time-domain analysis to further prove that the SERS enhancement of the films is mainly determined by “hot spots” in the interparticle gap between Ag nanoparticles. The detection limit of the Ag film/Ag nanoparticles/Mo–Ag alloy film for Rhodamine 6G probe molecules was 5 × 10−14 mol/L. Therefore, the novel type of the Ag film/Ag nanoparticles/Mo–Ag alloy film can be used as an ideal SERS-active substrate for low-cost and large-scale production.

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confidence: 99%

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Lian

Sun

et al. 2020

Nanotechnology Reviews

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“…Conversely, the intensity of the Mo (110) diffraction peaks in the Mo-Ag films decreases as the annealing temperature increases, which demonstrated that the Ag grains have an inhibitory effect on the growth of Mo grains [ 28 ]. Additionally, there are no diffraction peaks of Mo and Ag compounds in XRD patterns due to the extremely low solubility of Mo and Ag [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Annealing on the Microstructure and SERS Performance of Mo-48.2% Ag Films

Sun

Lian

et al. 2020

Materials

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Mo-48.2% Ag films were fabricated by direct current (DC) magnetron sputtering and annealed in an argon atmosphere. The effects of annealing on the surface morphology, resistivity and surface-enhanced Raman scattering (SERS) performance of Mo-48.2% Ag films were investigated. Results show a mass of polyhedral Ag particles grown on the annealed Mo-48.2% Ag films’ surface, which are different from that of as-deposited Mo-Ag film. Moreover, the thickness and the resistivity of Mo-48.2% Ag films gradually decrease as the annealing temperature increases. Furthermore, finite-difference time-domain (FDTD) simulations proved that the re-deposition Ag layer increases the “hot spots” between adjacent Ag nanoparticles, thereby greatly enhancing the local electromagnetic (EM) field. The Ag layer/annealed Mo-48.2% Ag films can identify crystal violet (CV) with concentration lower than 5 × 10−10 M (1 mol/L = 1 M), which indicated that this novel type of particles/films can be applied as ultrasensitive SERS substrates.

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“…Also, from the phase diagram, they are miscible in the liquid phase, but no compound and intermediate phases exist. So far, most of the studies in the Ag-Mo system focus on the thermodynamic properties [15][16][17] and microstructure [18][19][20]. Furthermore, the alloying behaviour of Ag-Mo films prepared by the ion mixing method has also been studied [16,17,21].…”

Section: Introductionmentioning

confidence: 99%

“…However, the non-equilibrium technique theoretically provides the possibility to form metastable solid solutions and intermediate compounds for immiscible alloys. So it is one of the non-equilibrium methods for preparing immiscible alloys [19,22,23]. Recently, Sarakinos et al [19] predicted phase stability through DFT calculations, and the results were verified by magnetron sputtering.…”

Section: Introductionmentioning

confidence: 99%

Effect of microstructural evolution on mechanical and electrical properties of Ag–Mo thin films

Baolong

Zhou

Zhang

et al. 2021

Surface Engineering

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Herein, Ag-Mo films were deposited on Si(100) substrates by magnetron co-sputtering. The phase evolution and microstructural investigation revealed that the pure Ag phase and no Ag(Mo) solid solution were formed in the Ag-rich films even though the Mo content reached 53 at.%. However, the metastable Mo(Ag) solid solution was formed on the Mo-rich side. The Young's modulus, hardness, resistivity and the relationship between these properties and the microstructural evolution of Ag-Mo films were studied. Precisely, when the Mo content was controlled at 86 at.%, the hardness reached the maximum value of 14.64 GPa, and exceeded that of the pure Mo film. Meanwhile, the resistivity appeared to be a minimum value because the film had the maximum solid solubility and better crystallinity. The study on the microstructural, mechanical and electrical properties of Ag-Mo films provided a basis for the application of the film in electrical contact coatings.

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Theoretical and experimental study of metastable solid solutions and phase stability within the immiscible Ag-Mo binary system

Cited by 15 publications

References 53 publications

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Effects of Ag contents on the microstructure and SERS performance of self-grown Ag nanoparticles/Mo–Ag alloy films

Effect of Annealing on the Microstructure and SERS Performance of Mo-48.2% Ag Films

Effect of microstructural evolution on mechanical and electrical properties of Ag–Mo thin films

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