Partially surface molten state

To overcome these issues, an alternative brazing technique has been developed specifically for use in fabricating solid-state electrochemical devices [74]. Referred to as air brazing, the technique employs a molten oxide that is at least partially soluble in a noble metal solvent to promote wetting of the ceramic sealing surface. Due to its ability to dissolve in the noble metal liquid, the oxide compound serves as an in situ oxygen buffer, raises the chemical activity of dissolved oxygen, and enhances... 

Figure 5 displays the SEM and TEM images of Ag core/poly(ADA)-shell hybridized NCs [50], Actually, Ag core was clearly covered with almost uniform poly(ADA) shell. The thickness of the shell was about 5 nm, and the morphology of the core/shell nanostructure in the present hybridized NCs was dependent remarkably on microwave irradiation conditions [50], For example, the above-mentioned microwave irradiation condition is the most desirable, and the core/shell nanostructure could not be formed successfully when the irradiation condition was 500 W, 20 s or 200 W, 40 s. After co-reprecipitation, the dispersion liquid is considered to be a mixture of Ag NPs and ADA NCs. The heated ADA NCs were probably partially melted by microwave irradiation, and may easily collide and fuse with Ag NPs at the elevated temperature. As a result, molten ADA monomer could adsorb effectively on the surface of Ag core, and was then recrystallized to form solid-state polymerizable ADA shell during the cooling process after microwave irradiation [50]. The present co-reprecipitation and microwave-irradiation method is available for the fabrication of another type of metal-core/ji-conjugated polymer-shell hybridized NCs [107]. 

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