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> Nanotech forum > Nanotech > Gold nanorods
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Gold nanorods |
JK
Join Date:
Sat May 19 02:52:49 2007
Posts:1
Reputation:10
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RE: Spheres and rods |
My understanding so far is
1. The spheres are also gold nanoparticles.
2. The CTAB(I also wonder what this chemical is used for)is coated all over the spheres and rods.
3. Therefore, the CTAB makes spheres and rods aggregated instead of dispersed in water.
My questions are
Am I correct above? If then, how could I possibly remove CTAB?
Thanks - jaseung |
| Created: Mon May 21 04:20:17 2007
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RP
Join Date:
Sun Jun 3 04:00:34 2007
Posts:10
Reputation:10
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RE: Gold nanorods |
| "sonication" is when ultrasonic field is so intense that you initiate cavitation. |
| Created: Sun Jun 3 20:29:43 2007
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Alexey
Join Date:
Mon Apr 2 04:58:18 2007
Posts:78
Reputation:11
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RE: Gold nanorods |
| I am not sure that your definition of "sonication" is the one which most people use. For example, in the community of people studying carbon nanotubes it is frequent to hear that tubes are sonicated in dichloroethane. Of course, in this case, the sonication is mild and used to disperse the tubes and make a suspension. |
| Created: Sat Jun 9 18:29:15 2007
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RP
Join Date:
Sun Jun 3 04:00:34 2007
Posts:10
Reputation:10
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RE: Gold nanorods |
"most people" is a vague term
ask Ken Suslick at UIUC what "sonication" means.
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speaking of nanotubes community, of course nanotube people can use use QD SQUID to "measure" superconductvity in zeolite - embedded carbon nanotubes and even publish results of this crap in Science, but it does not make it valid science :-) |
| Created: Wed Jun 13 05:13:09 2007
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AB
Join Date:
Thu Jun 21 22:16:59 2007
Posts:6
Reputation:10
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RE: Gold nanorods |
I think a meaning of a term is determined by the majority of people. This has nothing to do with scientific knowledge. Just people use the term "sonication" to indicate a process of placing carbon nanotubes into an organic solvent and then placing these tubes into an ultrasonic bath. In this case the tubes are not dissolved but simply dispersed (regular nanotubes are not solvable in know organic solvents).
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| Created: Thu Jun 21 22:18:58 2007
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