Hi everyone; I know you can try to dissolve CNTs in ethanol or some solvent then wait. After a while if you can't see sediment in the bottle then there is no problem, your CNTs are succesfully functionalized. So my first question is how long does it take to decide that it is functionalized. And second one what is the reliability of this method? (I know there are other methods which are used to support the result such as FTIR spectra. But can we trust just this method without using another one?) The last and important one is that Do I have to use specific solvent which is related to my functional groups on CNTs?