One-pot manufacture of nanoparticle-based films in aqueous media via an electric field-driven assembly process

Gonzalo‐Juan, Isabel; Escribano, J.A.; Castro, Yolanda; Sánchez-Herencia, Antonio Javier; Fierro, J.L.G.; Ferrari, B.

doi:10.1039/c3gc42539h

Cited by 7 publications

(8 citation statements)

References 38 publications

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“…In fact, the mean particle size of TiN powder is 26-32 nm, but agglomerates of ∼200 nm can be observed in FE-SEM exploration [24]. This evidence verifies the optimal homogeneous growth of the TiN coating deposited by EPD [30]. However, EPD coatings are rougher than those obtained by PVD [23] or nitriding [10] and high roughness increase the exposed surface, which could be interesting in processes such as biomedical and catalysis applications but would have adverse consequences in its protective character.…”

Section: Mendoza Et Alsupporting

confidence: 52%

Protective nature of nano-TiN coatings shaped by EPD on Ti substrates

Mendoza

González

Gordo

et al. 2018

Journal of the European Ceramic Society

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A B S T R A C TThe hardness and corrosion resistance of TiN coatings, processed by Electrophoretic Deposition (EPD) to cover polished and unpolished Ti substrates, have been evaluated. A deposition time of 5 min has been enough to obtain a cohesive layer of 7-8 μm in thickness. The coatings were thermally treated in vacuum atmosphere at 1200°C for 1 h with heating and cooling rates of 5°C min The nanohardness values of the polished samples have been increased from 2.8-4.8 GPa up to 6.5-8.5 GPa. Besides, the corrosion current density has been reduced more than one order of magnitude obtaining a protective efficiency of 82%. These values have been compared with other works in literature where authors used complex and costly processing techniques, demonstrating the strong impact of the colloidal processing over the specific properties of the material.

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Section: Mendoza Et Alsupporting

confidence: 52%

Protective nature of nano-TiN coatings shaped by EPD on Ti substrates

Mendoza

González

Gordo

et al. 2018

Journal of the European Ceramic Society

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“…Previous studies report the O 1s binding energy for lattice oxygen in ZrO 2 or YSZ between 529.6 and 530.4 eV [61][62][63][64][65][66], consistent with our result. The secondary peak has a binding energy between 531.2 and 531.9 eV [61,62,[64][65][66]. This shoulder feature is attributed to O-H bonds [62,64,65] at the sample surface and can be an indicator of O vacancies [64,66], consistent with our compositional analysis showing oxygen deficiencies.…”

Section: Xpssupporting

confidence: 93%

“…The YSZ O 1s signal has a main peak at 529.9 eV with a small shoulder centered at 531.4 eV. Previous studies report the O 1s binding energy for lattice oxygen in ZrO 2 or YSZ between 529.6 and 530.4 eV [61][62][63][64][65][66], consistent with our result. The secondary peak has a binding energy between 531.2 and 531.9 eV [61,62,[64][65][66].…”

Section: Xpssupporting

confidence: 92%

The effect of metal–insulator interface interactions on electrical transport in granular metals

Gilbert

Rosenberg

Kotula

et al. 2022

J. Phys.: Condens. Matter

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We present an in-depth study of metal–insulator interfaces within granular metal (GM) films and correlate their interfacial interactions with structural and electrical transport properties. Nominally 100 nm thick GM films of Co and Mo dispersed within yttria-stabilized zirconia (YSZ), with volumetric metal fractions (φ) from 0.2–0.8, were grown by radio frequency co-sputtering from individual metal and YSZ targets. Scanning transmission electron microscopy and DC transport measurements find that the resulting metal islands are well-defined with 1.7–2.6 nm average diameters and percolation thresholds between φ = 0.4–0.5. The room temperature conductivities for the φ = 0.2 samples are several orders of magnitude larger than previously-reported for GMs. X-ray photoemission spectroscopy indicates both oxygen vacancy formation within the YSZ and band-bending at metal–insulator interfaces. The higher-than-predicted conductivity is largely attributed to these interface interactions. In agreement with recent theory, interactions that reduce the change in conductivity across the metal–insulator interface are seen to prevent sharp conductivity drops when the metal concentration decreases below the percolation threshold. These interface interactions help interpret the broad range of conductivities reported throughout the literature and can be used to tune the conductivities of future GMs.

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“…48-0224), while the 8YSZ and 30YSZ nanospheres consist of the fully cubic phase (JCPDS No. 30-1468) [ 19 , 20 ]. Moreover, the nitrogen adsorption/desorption isotherms of all prepared YSZ nanospheres exhibit typical Type II behavior, indicating the non-porous nature of the YSZ nanospheres ( Figure S2 ), which is consistent with their specific surface areas and total pore volumes (18 m 2 g −1 /0.22 cm 3 g −1 , 19 m 2 g −1 /0.22 cm 3 g −1 , and 7 m 2 g −1 /0.07 cm 3 g −1 for 3YSZ, 8YSZ, and 30YSZ, respectively).…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Yttria-Stabilized Zirconia Nanospheres from Zirconium-Based Metal–Organic Frameworks and the Dielectric Properties

et al. 2022

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Yttria-stabilized zirconia (YSZ) nanospheres were synthesized by calcination at 900 °C after the adsorption of Y3+ ions into the pores of a zirconium-based metal–organic framework (MOF). The synthesized 3YSZ (zirconia doped with 3 mol% Y2O3), 8YSZ (8 mol% Y2O3), and 30YSZ (30 mol% Y2O3) nanospheres were found to exhibit uniform sizes and shapes. Complex permittivity and complex permeability were carried out in K-band (i.e., 18–26.5 GHz) to determine their suitability for use as low-k materials in 5G communications. The real and imaginary parts of the permittivity of the sintered 3YSZ were determined to be 21.24 and 0.12, respectively, while those of 8YSZ were 22.80 and 0.16, and those of 30YSZ were 7.16 and 0.38. Control of the real part of the permittivity in the sintered YSZ was facilitated by modifying the Y2O3 content, thereby rendering this material an electronic ceramic with potential for use in high-frequency 5G communications due to its excellent mechanical properties, high chemical resistance, and good thermal stability. In particular, it could be employed as an exterior material for electronic communication products requiring the minimization of information loss.

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One-pot manufacture of nanoparticle-based films in aqueous media via an electric field-driven assembly process

Abstract: We present a one-pot process to produce an extremely dense packed YSZ nanostructure that can consolidate at unconventionally low temperature.

Cited by 7 publications

References 38 publications

Protective nature of nano-TiN coatings shaped by EPD on Ti substrates

Protective nature of nano-TiN coatings shaped by EPD on Ti substrates

The effect of metal–insulator interface interactions on electrical transport in granular metals

Synthesis of Yttria-Stabilized Zirconia Nanospheres from Zirconium-Based Metal–Organic Frameworks and the Dielectric Properties

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