Nick F - 29-7-2007 at 09:37
Anyone else here fascinated by these things? I think flourescent things are neat in general, but these have to take the prize for being the coolest.
This page makes me think that they might actually be quite easy to make:
http://www.viewsfromscience.com/documents/webpages/nanocryst...
The question is, has anyone here tried? Or has anyone seen them cheaper than here?
http://www.nntech.com/store/qdots.html
BromicAcid - 29-7-2007 at 09:45
They're pretty easy to make. We made them in Physical Chemistry in college. Very fun stuff, we worked mostly with gold Q-dots but also made cadmium
and other Q-dots. Messed around with the surface chemistry of them to give different colors and solubilities and also made all sorts of different
colors.
I had a conversation (not on the forum) with Chemoleo regarding Q-dots and their applications to biological studies (for their use as tracers) however
there wasn't a whole lot of information on how to practically use them for this in the current literature at the time (that we could find).
Nick F - 31-7-2007 at 03:17
Any chance you could post a brief outline of the methods you used in college?
pantone159 - 31-7-2007 at 11:53
Some articles from Journal of Chemical Education about quantum dot experiments... I haven't tried any of these (or necessarily actually read these
particular articles 
) but they seem relevant. I will try and post the articles
if I can figure out how to add attachments...
Experiments from Journal of Chemical Education, mostly with supplemental material, which is additional info intended for the
instructor that does not make it onto the printed article.
Semiconductor nanocrystals: A powerful visual aid for introducing the particle in a box, JCE Vol 79 No 9 Sep 2002 p1094 - p1094.pdf.
Preparation of Dppe-stabilized gold nanoparticles, JCE Vol 82 No 5 May 2005 p769 - p769.pdf, JCE2005p0769W.pdf.
A safer, easier, faster synthesis for CdSe quantum dot nanocrystals, JCE Vol 82 No 11 Nov 2005 p1697 - p1697.pdf, JCE2005p1697W.pdf.
Synthesis and study of silver nanoparticles, JCE Vol 84 No 2 Feb 2007 p322 - p322.pdf, JCE2007p0322W.pdf.
Optical properties of fluorescent mixtures: Comparing quantum dots to organic dyes, JCE Vol 84 No 8 Aug 2007 p1301 - p1301.pdf, JCE2007p1301W.pdf.
Attachment: p322.pdf (380kB)
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pantone159 - 31-7-2007 at 11:59
Another...
Attachment: p769.pdf (103kB)
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pantone159 - 31-7-2007 at 12:02
I hope it is ok to be posting these attachments here??
Attachment: p1094.pdf (409kB)
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pantone159 - 31-7-2007 at 12:05
I can only figure out how to attach one per post...
Attachment: p1301.pdf (375kB)
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pantone159 - 31-7-2007 at 12:10
Another...
Attachment: p1697.pdf (298kB)
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pantone159 - 31-7-2007 at 12:12
Now for some of the unprinted 'supplemental material'...
Attachment: JCE2005p0769W.pdf (204kB)
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pantone159 - 31-7-2007 at 12:13
Another supplement
Attachment: JCE2005p1697W.pdf (62kB)
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pantone159 - 31-7-2007 at 12:15
And another
Attachment: JCE2007p0322W.pdf (117kB)
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pantone159 - 31-7-2007 at 12:19
Finally the last attachment...
Attachment: JCE2007p1301W.pdf (554kB)
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BromicAcid - 31-7-2007 at 13:33
Nick, although not all the preps we followed were included in the attachments pantone supplied I did do two of them. I do not have the other
procedures that we followed though, at least not handy.