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Carbon nanotube springboard can weigh individual atoms
arifsali
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7-22-2008 2:00 PM
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nanotechnology
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/bd2c6600-0e2c-477c-ba8f-5b331abda3cc/E18DCF5E-06C5-44E1-8FDE-F6428493F341/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://technology.newscientist.com/channel/tech/dn14370-nanotube-springboard-weighs-bouncing-atoms.html?feedId=online-news_rss20" href="http://technology.newscientist.com/channel/tech/dn14370-nanotube-springboard-weighs-bouncing-atoms.html?feedId=online-news_rss20" style="font-size: 11px;">technology.newscientist.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://technology.newscientist.com/channel/tech/dn14370-nanotube-springboard-weighs-bouncing-atoms.html?feedId=online-news_rss20"><P>A tiny springboard constructed from a carbon nanotube can weigh individual atoms as they fall onto its surface. The device could replace high-resolution <A target="ns" href="http://en.wikipedia.org/wiki/Mass_spectrometry">mass spectrometers</A>, which tend to destroy the samples they weigh.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://technology.newscientist.com/channel/tech/dn14370-nanotube-springboard-weighs-bouncing-atoms.html?feedId=online-news_rss20"><P><A target="ns" href="http://en.wikipedia.org/wiki/Resonator">Resonators</A>, materials that naturally oscillate strongly at certain frequencies, help to enhance the sound of many musical instruments.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://technology.newscientist.com/channel/tech/dn14370-nanotube-springboard-weighs-bouncing-atoms.html?feedId=online-news_rss20"><P>Kenneth Jensen, Kwanpyo Kim and <A target="ns" href="http://physics.berkeley.edu/index.php?option=com_dept_management&act=people&Itemid=299&limitstart=0&task=view&id=238">Alex Zettl</A> at the University of California in Berkeley have discovered that carbon nanotubes are perfect for the task.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://technology.newscientist.com/channel/tech/dn14370-nanotube-springboard-weighs-bouncing-atoms.html?feedId=online-news_rss20"><P>Because nanotubes are hollow, they have a mass four orders of magnitude lower than specially built micromachined resonators. That brings their mass into the attogram range (a billionth of a billionth of a gram), and means they respond to single atoms.</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://technology.newscientist.com/channel/tech/dn14370-nanotube-springboard-weighs-bouncing-atoms.html?feedId=online-news_rss20"><P>Jensen's team took a multi-walled carbon nanotube roughly 250 nanometres in length and attached one end to an electrode while leaving the other end free, forming a tiny springboard.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/E18DCF5E-06C5-44E1-8FDE-F6428493F341/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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