Conclusions

Through the process of cavitation, ultrasound performs high-energy chemistry. A variety of applications to the synthesis of nanocrystalline metals, amorphous metals, alloys, nanophasic colloids, and catalysts extend to oxides, nitrides carbides, and chancogenides. There are other bionanomaterial applications through the synthesis of protein microspheres and HAp. The applications of high-intensity ultrasound to the synthesis of nanomaterial science is not only diverse, but also has been expanding over the past decade. The sonochemical synthesis of amorphous, and more recently nanocrystalline, materials has been investigated for application in magnetic devices requiring magnetically soft materials. Such synthetic conditions result from cavitational collapse, resulting in high local temperatures and pressures with exceptionally high cooling rates. The synthetic conditions and the modified property-related studies have been discussed in this review, with special emphasis on nanometals, alloys, oxides, and chalcogenides.

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