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The first commenter really nailed this topic on the head. Dubrovinskaia, et. al. has not shown that Aggregate Diamond Nanorods are anything other than nano sized polycrystalline Diamond (aggregated in rod shapes). As the first commenter suggested, this should NOT be considered a NEW material. Dubrovinskaia, et. al. show in another paper that nano sized c-BN ( cubic boron nitride) is at least as hard as diamond. They suggest (along with other sources) that smaller particle sizes = stronger material. This is exactly what their paper on Aggregate Diamond Nanorods shows. They most likely made nano sized diamond and not a new allotrope of carbon. 8/28/08
Not going to put a ton of effort in to this. But just a question, the elastic modulus of diamond is 1141GPa. Never actually used the bulk modulus before, but it seems somewhat specious to me that the bulk modulus would be 3x *lower* than the elastic modulus, why would the material behave more compliantly under more constrained loading? Also how do you actually do this test, if the material is so hard, what is physically there measuring these properties, it looks to me like it might be a machine compliance issue yielding lower values... Maybe someone with more time, or more mechanical properties experience could figure it out. —Preceding unsigned comment added by 70.137.185.190 ( talk) 05:18, 12 June 2008 (UTC)
I think the figure of the diamond anvil should be replaced - this one has some stuff that clearly has nothing to do with diamond nanorods ("sample from the earth's crust.. what?"); it's confusing. -Scott , 2/28/08
--- —Preceding unsigned comment added by 128.101.156.247 ( talk) 19:17, 28 February 2008 (UTC)
It would be better to say that this substance was "synthesized" rather than "discovered" since there is no evidence that this material occurs naturally.
--- Why does this link to a Wikipedia article in a different language? -Sprited Spheniscidae
I find this content strange. If it's amorphous it's not an allotrope of carbon (by definition). If on the other hand it isn't amorphous then it is just diamond (albeit with small (nanosized) grains, a known ultrahard material). Also rather than link to the slashdot comments of someone called 'h4x0r-3l337' wouldn't a citation to a peer reviewed journal article be more appropriate?
Closest thing I can find is this: theoretical stuff I have a hard time understanding Browb3aten 01:50, 11 August 2007 (UTC)
After reading this forum, there should be no questions on my revisions on 18-Jan-2009 NIMSoffice ( talk) 07:35, 18 January 2009 (UTC)
Reference 1 says "Subsequent experiments, carried out by loading a diamond anvil cell with both single crystal diamond and ADNR material, in order to directly compare their behaviour under static load..." which brings up the question, how do you use a diamond anvil cell to test a material that is harder than the diamond anvil cell? It seems like the diamond anvil cell would deform before the aggregated diamond nanorod sample would. Guy Macon 18:27, 20 May 2010 (UTC)
this article from vanderbilt university describes making various computer circuits out of nanodiamond, but their manufacturing process for the diamond seems different. This seems to be an important breakthrough, but i dont know if it belongs here, or at another article. Mercurywoodrose ( talk) 02:50, 8 August 2011 (UTC)
IMO it would be good to have in the article a picture comparing the structure or regular diamonds with this variant's. -- TiagoTiago ( talk) 06:06, 13 August 2013 (UTC)
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