Polymers-Carbon Nanotube Nanocomposites

Dear Guys; In fact I work on PMMA-CNT nanocomposite. Actually I faced with a problem! If you have same experience would you please help me!?
As you know DMF is a great solvent for CNTs and PMMA, but I can't make thin film by spin coating! Do you have any idea? I appreciate Ebi
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