http://imechanica.org/node/2203 Comments for "Watching buckyballs shrink" en http://imechanica.org/node/2203#comment-5693 <p><object classid="d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" width="425" height="355"></p> <param name="height" value="355" /> <param name="width" value="425" /> <param name="wmode" value="transparent" /> <param name="src" value="http://www.youtube.com/v/NSNlE8AreeM" /> <embed type="application/x-shockwave-flash" height="355" width="425" wmode="transparent" src="http://www.youtube.com/v/NSNlE8AreeM"></embed><br /> </object></p> <br class="clear" /> Sun, 28 Oct 2007 22:51:44 -0400 Teng Li comment 5693 at http://imechanica.org http://imechanica.org/node/2203 <p> PRL 99, 175503 (2007); &nbsp; Jianyu Huang, Feng Ding, Kun Jiao, Boris I Yakobson </p> <p> Youtube Movie:&nbsp; <a href="http://www.youtube.com/watch?v=NSNlE8AreeM" title="http://www.youtube.com/watch?v=NSNlE8AreeM">http://www.youtube.com/watch?v=NSNlE8AreeM</a> &nbsp;&nbsp; <a href="http://www.nature.com/nnano/reshigh/2007/1107/full/nnano.2007.404.html" target="_blank"><span class="yshortcuts">http://www.nature.com/nnano/reshigh/2007/1107/full/nnano.2007.404.html</span></a> </p> <p> We report in situ high-resolution transmission electron microscopy observing the shrinkage of singlelayer giant fullerenes (GF). At temperatures
2000 C, the GF volume reduces by greater than one 100-fold while the fullerene shell remains intact, evolving from a slightly polygonized to a nearly spherical shape with a smaller diameter. The number of carbon atoms in the GF decreases linearly with time until the small subbuckyball cage opens and rapidly disappears. Theoretical modeling indicates that carbon atoms are removed predominantly from the weakest binding energy sites, i.e., the pentagons, leading to the constant evaporation rate. The fullerene cage integrity is attributed to the collective behavior of interacting defects. These results constitute the first experimental evidence for the &lsquo;&lsquo;shrink-wrapping&rsquo;&rsquo; and &lsquo;&lsquo;hot-giant&rsquo;&rsquo; fullerene formation mechanisms. </p> <p> <font size="1">News Fullerene PRL<br /> </font> </p> <p><a href="http://www.nature.com/nnano/reshigh/2007/1107/full/nnano.2007.404.html" target="_blank"><span class="yshortcuts">http://www.nature.com/nnano/reshigh/2007/1107/full/nnano.2007.404.html</span></a><font size="2"><br /> </font>http://www.sandia.gov/news/resources/releases/2007/buckyball.html</p> <p>http://technology.newscientist.com/article/dn12848-shrinkwrapped-buckyballs-caught-on-film-.html<font size="2"><br /> </font>http://www.eetimes.com/news/latest/showArticle.jhtml?articleID=202800147<font size="2"><br /> </font>http://nanotechweb.org/cws/article/tech/31675<font size="2"><br /> </font>http://www.sciencedaily.com/releases/2007/10/071026162143.htm<font size="2"><br /> </font>http://www.eurekalert.org/pub_releases/2007-10/ru-vsb102607.php<font size="2"><br /> </font>http://www.media.rice.edu/media/NewsBot.asp?MODE=VIEW&amp;ID=10176&amp;SnID=926414354<font size="2"><br /> </font>http://www.azonano.com/news.asp?newsID=5198<font size="2"><br /> </font>http://www.physnews.com/showlink.php?id=99505<font size="2"><br /> </font>http://www.sciencenewsdaily.org/story-112637658.html<font size="2"><br /> </font>http://www.nanotech-now.com/news.cgi?story_id=25943<br /> <a href="http://www.nanotechnology.com/news/?id=11613" title="http://www.nanotechnology.com/news/?id=11613">http://www.nanotechnology.com/news/?id=11613</a></p> <br class="clear" /> http://imechanica.org/node/2203#comments research Buckyballs carbon nanotubes in-situ electron microscopy Sat, 27 Oct 2007 17:12:24 -0400 Jianyu Huang 2203 at http://imechanica.org