For instance, which gel is convenient for arc discharge SWNT metallic/semiconducting separation in column chromatography?
Hi Rüya
In our experience the pore size of the gel has little influence over the metallic/semiconducting separation of CNTs - I assume you are referring to Sephacryl gels? There it is just important to use either S-200 or S-100, we do not see any separation on pore sizes larger than that but between S-200 or S-100 we do not see any difference in the quality of the separation. To separate arc discharge material it is more complicated because there isn't a dramatic difference between the surfactant coating around the two different types of CNTs - you will need to use a co-surfactant approach, but you can still use S-200 gel. Have a look at our recent paper on DWCNTs, you can use the exact same approach for arc discharge SWCNTs for a metallic/semiconducting separation (ACS nano 9 (4), 3849-3857)
Good luck!
Ben
Hi Dear Dr. Benjamin,
I really appreciate for your valuable and informative answer. Actually, I was referring Sephacryl or different gels such as Agarose and its derivatives. We used both of them (S-200 gel and Sepharose 2B gel) and observed diverse results on diameter separation (HiPco SWNTs). I think it is not quite easy to determine which mechanism plays an important role, therefore we will keep going for investigation of interactions between SWNTs and gels/surfactants as you make points and I will have a look at your recent paper.
Best Regards
Rüya