Could someone tell a simple method of functionalization of CNTs or other nano particles prone to agglomeration.
You have to specify which nanoparticle. I agree with you naked metallic particles do agglomerate but if you know the use e.g. conjugating with organic molecules. You can do by sonicating NP in mercaptopropionic acid less than 10mmolar solution. Metals readily react with above acid with thiol group. At the end you will have NP with COOH group ready for conjugation. In any means you must keep concentration of NP less than 100ug/ml.
Another way is during last part of synthesis you can add PEG 0.25% by weight and keep mixing for 10 minutes or more less than 90 degree ' C. Then follow the washing procedure. Above methods are not applicable to all. Regarding the CNT it is. Different story! !!!.
Good luck
You can surface activate the CNT using a low vacuum plasma (plasma cleaner, jewelry cleaner, plasma reactor) and coat them with almost anything. A very low vacuum plasma alone (plasma reactor) creates a stable hydrophillic surface on silicone elastomer or PVP. Alternatively, have tried washing in low bloom gelatin. More info available if needed.
Please, refer to the paper.
"Self-Selective Separation of Single-Walled Carbon Nanotubes via a Hydroxyl Group Reaction" Kon Yi Heo et al. Electrochemical and Solid-State Letters, 12 (12) K71-K73 (2009)
Simple method is ultrasonication and centrifugation.
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