I have used water and hexadecane to dissolve the HNTs but can't dissolve it quite well , so i couldn't measure its size
which solvent do you recommend me to use?
You can't dissolve nanotubes in water or in any other solvent. You can digest them to CO2 with fuming nitric acid. I assume you mean disperse.
If the material you're using is supplied as a powder then you need laser diffraction not DLS.
Dear Hocine, did you also considered to use a sonicator to break up potential clusters in solution? If your sample is not very well dispersed, did you also considered some surfactant agents? I hope that my answer can help you somehow :)
Thank you so much dear teachers for your answers
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