[3dem] Graphene oxide!

[Christian Geiss]

Dear 3dem members,

I would like to hydrophilize grids with graphene oxide. Does anyone has experience with it? To be more informative,
I am interested what proportion of oxygen gives empirically the most hydrophility and is still adequate in handling. Of course,
hydrophility appears to follow the thumb rule: the more oxygen, the better. 

But since there are many companies that offer a broad product range for graphene oxide with lots of different quality specifications, I was wondering a bit, 
if it is really necessary to take the product that promises the highest oxygen moiety. For instance, the oxygen ranges between 20 up to 50%
(all are using the hammers method for oxidation of graphene), but most offer 20%. And of course, according to the producer, it is all soluble in water 
(but I also heard that it partially can clump out in water, dependent on the level of oxygen and how large is the fraction that has been oxidized). 

So what do you think? Can you recommend any supplier?

Any input here would be highly appreciated,

Christian Geiss



-- 

Christian Geiss, M.sc.
Universitaet Frankfurt BMLS 


Frangakis Group[ -> http://www.fmls-institute.de/fileadmin/template/images/1px_trans.gif] 


Max-von-Laue-Strasse 15 


D - 60438 Frankfurt am Main 


Phone: +49-(0)69-79842597 


Fax: +49-(0)69-79846467 


geiss at biophysik.org 



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