Acoustic cavitation can provide high temperatures and pressures facilitating the formation of many nanostructures. How is it determined that these extreme conditions do not lead to the deterioration of the formed nanostrucrures?
Deterioration and formation proceed simultaneously but at start, building of new particles exceed destruction.
Dear Dr. Rogoza,
thanks for your answer. What can be inferred from this fact about the crystallinity of the prepared particle? Do these simultaneous formation and deterioration of the particles let them be formed in a crystalline nature?
Bests,
It is difficult to give a definite answer. This depends on the substance and on the conditions, and ultrasound power. I've already answered on RG about crystallization of pharmaceutical substances - where ultrasound was used for growing of larger crystals. Though more often small crystals are formed.
Thanks for your informative answer. Would you please help me find related useful papers or books?
"Chemistry with ultrasound" , T.J. Mason (ed.) - my first reference book. Please note on pressure in cavitation bubble - it is sufficient to break chemical bonds and deform crystals. Cold pressing of copper need only 1000atm.
http://www.sciencedirect.com/science/article/pii/S1350417706001684 - Ultrasound-assisted crystallization (sonocrystallization)
http://pubs.acs.org/doi/abs/10.1021/op050109x - Sonocrystallization: The Use of Ultrasound for Improved Industrial Crystallization
http://www.sciencedirect.com/science/article/pii/S1350417714000534 - Sonocrystallization and sonofragmentation
http://www.organic-chemistry.org/topics/sonochemistry.shtm
http://en.wikipedia.org/wiki/Sonochemistry
Dear Dr. Rogoza,
I am so much thankful to you for your guidance. thank you very much for your patience in answering my question.
Best regards,
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