I am Functionalizatng the Silica Nanoparticles with Various Mono-Alkoxy Derivatives such as methoxydimethyloctylsilane, methoxytrimethylsilane using the process of ultrasonication.
I want to know that how ultrasonication leads to the surface functionalization of silica nanoparticales with the chains of methoxydimethyloctylsilane or other Mono-Aloxy derivatives?
Only mono-Aloxy derivatives can be used for the surface functionalization in ultra sonic processing?
You do not need ultrasonication for silanization reactions to occur. Perhaps you are only helping in nanoparticle dispersion and the created heating will only accelerate the condensation process.
In recommendation to Omar sir, ultrasonication is not needed for self assembling processes
Sonication is one of the techniques to graft alkoxysilanes on silica. You can also follow in solution or in suspension protocols. You can also use mild catalysts to promote the hydrolysis to accelerate the grafting and to adjust the grafting density you want. You can use mono, di and trialkoxysilanes to graft them on various silica.
Rohan Riaz
From the huge amount of energy introduced into the system. An ultrasound 'bubble' collapses as about 10E11 g (where g is the acceleration due to gravity) and the localized heat is about 5000 K. See:
Ultrasound, cavitation, and the singing kettle http://tinyurl.com/olueohz
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