I am carrying out sonication of exfoliated materials and a bit confused about the ways to change my procedure. My sonication system has been specifically optimised for water based materials (1200 rpm, 1 hr). Recently, I have started using a solvent which is about 8 times more viscous than water. Therefore, I want to know the possible changes in sonication I should be looking forward to.

1- How does sonication rpm and time depend on the viscosity as the material being exfoliated is same?

2- If I use only one bottle of liquid after exfoliation for sonication, can I use another bottle of water on the symmetrically opposite side or does it need to be the same solvent in the other bottle. Asking this as I don't want to use blank solvent just for sonication. Further, if I use water, should it equal volume or equal weight compared to the first bottle?

Thanks in advance.

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