There is one belief indicating on shortening of nanotubes under intense ultrasonication. Is there any maximum value for the ultrasound power when we apply sonication by a probe? I could not disperse my nanotubes in water by ultrasound bath which is why I am thinking of using a probe. Actually, I would pretreat nanotubes by acid treatment or the other methods fisrt.
Hello Ms. Raeisi;
I have already worked with Ultrasonic irradiation in my works both indirect (Ultrasonic Bath; UB) and direct (ultrasound probe; UP) their intensity is not comparable. For UB; power intensity can not be as high as 1-3 W/cm2 but when you use UP; power intensity can be increased significantly 40-50, or over 100-150 W/cm2 depending model of probe and machine, selected amplitude, diameter of applied probe and so on. Frankly speaking I am not familiar with Nanotube (I have just heard the Name!); but the intensity is not comparable. Keep in mind the vital effect of power intensity (W/cm2 or W/cm3). Also keep in mind about gradual increasing of ambient temperature by sonication.
Regards,
HH
Dear Mr.Haghi
I really appreciate your help. However, I want to know the thereshold(maximum) power intensity which can be used for nanotubes and they would not experience any changes in their structures.
Hi Zohreh,
You may find this paper useful. Cheers!
Y.Y. Huang, E.M. Terentjev. Dispersion of carbon nanotubes: mixing, sonication, stabilization, and composite properties. Polymers, 4 (1) (2012), pp. 275–295
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