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psychokinetic
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Now that's a more interesting picture 
“If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found
the object of his search.
I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor.”
-Tesla
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franklyn
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http://www.bnl.gov/bnlweb/pubaf/pr/PR_display.asp?prID=1008
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Ramiel
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Interesting, I've been doing a lot of reading on pentacene crystallisation, the last picture is very interesting. I wonder what surface they used?
pMMA?
In any event, it's an incredible picture. The "image" of the electrons says a lot which the models could never really confirm. Interesting to see some
allignment there, unless I'm imagining it - this is reminiscent of the slip dislocated herringbone arrangement pentacene adopts in bulk.
Sorry, I'm rambling, but I've just spent the last few months studying among other things the crystal packing of pentacene derivatives and this picture
is very exiting.
Caveat Orator
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franklyn
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UPDATE
Near Field Microscopy - Nanoscale imaging using light
http://www.azom.com/news.asp?NewsID=20626
Celebrating the 50 th birthday of the laser
http://www.laserfest.org/lasers/video-lasers.cfm
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smaerd
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That's so awesome! I wish I had more to add to the discussion but it's just so cool to see a molecule.
edit -Why does the outside shine brighter than the inside?
[Edited on 12-3-2010 by smaerd]
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chief
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Whats beeing seen is the electron density distribution; same counts for crytallography, bu there it's 3D (though not for single molecules)
The picture is more a stunt than an appliable new method ...
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franklyn
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http://www.sciencedaily.com/releases/2010/03/100324162621.ht...
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franklyn
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DNA strand - you can kind of see it
http://pubs.acs.org/doi/abs/10.1021/nl3039162
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sparkgap
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| Quote: | Direct Imaging of DNA Fibers: The Visage of Double Helix
Francesco Gentile, Manola Moretti, Tania Limongi, Andrea Falqui, Giovanni Bertoni, Alice Scarpellini, Stefania Santoriello, Luca Maragliano, Remo
Proietti Zaccaria, and Enzo di Fabrizio
Nano Letters (Article ASAP), November 22, 2012
DOI:10.1021/nl3039162
Abstract
Direct imaging becomes important when the knowledge at few/single molecule level is requested and where the diffraction does not allow to get
structural and functional information. Here we report on the direct imaging of double stranded (ds) λ-DNA in the A conformation, obtained by
combining a novel sample preparation method based on super hydrophobic DNA molecules self-aggregation process with transmission electron microscopy
(TEM). The experimental breakthrough is the production of robust and highly ordered paired DNA nanofibers that allowed its direct TEM imaging and the
double helix structure revealing. |
Get it here.
"What's UTFSE? I keep hearing about it, but I can't be arsed to search for the answer..."
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