Room temperature nanojoining of Cu-Ag core-shell nanoparticles and nanowires

Wang, Jiaqi; Shin, SangJoon

doi:10.1007/s11051-017-3761-6

Cited by 27 publications

(12 citation statements)

References 50 publications

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“…Coatings based on metallic nanoparticles (NPs) films, NPs dispersed in host dielectric or conductive matrices or barrier layers and hierarchical three-dimensional nanomaterials, are attracting a lot of interest due to their applicability in fields spanning from electro-catalysis [1], fuel cells [2], to antimicrobial coatings [3,4,5,6] and nanojoining [7,8]. However, to tailor the properties of nanostructured systems, the synthesis of nanoparticle-matrix nanocomposite coatings may require complex multi-step approach, even after the NPs synthesis, where matrix embedding may require colloidal stabilization, cross-linking growth and substrate functionalization [9].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Optical and Morphological Properties of Ag and Ag/TiO2 Nanocomposites Grown by Supersonic Cluster Beam Deposition

et al. 2017

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Nanocomposite systems and nanoparticle (NP) films are crucial for many applications and research fields. The structure-properties correlation raises complex questions due to the collective structure of these systems, often granular and porous, a crucial factor impacting their effectiveness and performance. In this framework, we investigate the optical and morphological properties of Ag nanoparticles (NPs) films and of Ag NPs/TiO2 porous matrix films, one-step grown by supersonic cluster beam deposition. Morphology and structure of the Ag NPs film and of the Ag/TiO2 (Ag/Ti 50-50) nanocomposite are related to the optical properties of the film employing spectroscopic ellipsometry (SE). We employ a simple Bruggeman effective medium approximation model, corrected by finite size effects of the nano-objects in the film structure to gather information on the structure and morphology of the nanocomposites, in particular porosity and average NPs size for the Ag/TiO2 NP film. Our results suggest that SE is a simple, quick and effective method to measure porosity of nanoscale films and systems, where standard methods for measuring pore sizes might not be applicable.

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Section: Introductionmentioning

confidence: 99%

Exploring the Optical and Morphological Properties of Ag and Ag/TiO2 Nanocomposites Grown by Supersonic Cluster Beam Deposition

et al. 2017

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“…A possible reason that our experimental results suggest that NWs actually have a lower melting point than NWs because these models only consider the melting of the whole wire, not surface melting. Nanomaterials tend to melt from surface to core [ 31 ] and the surface melting temperature occurs at a lower temperature than the full melting temperature and that difference is shape dependent. For example, according to Thouy et al and Volk et al, the thermal instability of NWs and other thin, 1D nanostructures results in NWs fragmenting and coalescing into chains of nanodroplets during melting (also known as Rayleigh breakup).…”

Section: Resultsmentioning

confidence: 99%

Wettability, Diffusion Behaviors, and Modeling of Ni Nanoparticles and Nanowires in Brazing Inconel 718

et al. 2020

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Ni nanoparticles (NPs) and nanowires (NWs) are compared as brazing filler metals for joining Inconel 718. NWs significantly enhance the strength of brazed joints compared to NP joints (270 MPa). Herein, joints formed with a pure NW pellet and a NW–NP mixed pellet yield average lap shear bonding strengths of 319.2 and 370 MPa, respectively. The experiment displays that the contact angle in brazing with NPs is higher than that with NWs. A modified Hart's equation is also proposed for predicting the effective interdiffusion coefficients of nanomaterials that account for surface diffusion in addition to lattice and grain boundary diffusion. The diffusion coefficients calculated by the modified Hart's equation are consistent with the values determined by Sauer–Friese analysis for NPs, but for NWs, the diffusion coefficients determined by Sauer–Friese are mainly controlled by grain boundary diffusion, significantly higher than those predicted by the modified Hart's equation due to size‐dependent transient liquid phase diffusion. This explains the enhanced brazing strength with NW fillers.

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“…Differing from the two-CS-NP sintering model, 28,29 the multiple-CS-NP model possesses more degrees of freedom. Although particle packing arrangement can affect the sintering rate due to different numbers of contact points, 24,30 the sintering rate is not a main focus of this research and it is formidable and unnecessary to test all possible arrangements.…”

Section: Modelling Of Multiple Cs Npsmentioning

confidence: 99%

Sintering of multiple Cu–Ag core–shell nanoparticles and properties of nanoparticle-sintered structures

Wang

Shin

2017

RSC Adv.

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Room temperature nanojoining of Cu-Ag core-shell nanoparticles and nanowires

Cited by 27 publications

References 50 publications

Exploring the Optical and Morphological Properties of Ag and Ag/TiO2 Nanocomposites Grown by Supersonic Cluster Beam Deposition

Exploring the Optical and Morphological Properties of Ag and Ag/TiO2 Nanocomposites Grown by Supersonic Cluster Beam Deposition

Wettability, Diffusion Behaviors, and Modeling of Ni Nanoparticles and Nanowires in Brazing Inconel 718

Sintering of multiple Cu–Ag core–shell nanoparticles and properties of nanoparticle-sintered structures

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