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it may be the process you adopted for the synthesis giving you the morphology what you probably seeing in TEM. Did you did SEM?
If you have doubt using ethanol use DI water then but it will take a bit long to dry so place the grid between two glass slide and dry using conventional table lamp.
Hi the problem is not with the solvent.
1. disperse your samples in ethanol
2. Sonicate for few seconds
3. let big particles settle down for few seconds
4. Hold the grid using a twizer in air
5. pick a drop from the upper portion of the solvent using pipet
6. hold the grid very carefuly and without much presurre
7. place a drop wait until it get dried then place a drop or two more and let it dry in air
8. Then you are all set