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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">纳米材料定义 </h1> <p class="xg1"> 时间：2011-10-19 14:02<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(2498)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=2529&idtype=aid" title="查看全部评论"><em id="_commentnum">1</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=62" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>这一定义是：纳米材料是一种由基本颗粒组成的粉状或团块状天然或人工材料，这一基本颗粒的一个或多个三维尺寸在1纳米至100纳米之间，并且这一基本颗粒的总数量在整个材料的所有颗粒总数中占50%以上。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content">欧盟委员会18日通过<a href="http://material.oecr.com" target="_blank" class="relatedlink">纳米</a><a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>的定义，根据这一定义，纳米材料的基本组成颗粒大小应在1纳米至100纳米之间。这一定义是：纳米材料是一种由基本颗粒组成的粉状或团块状天然或人工材料，这一基本颗粒的一个或多个三维尺寸在1纳米至100纳米之间，并且这一基本颗粒的总数量在整个材料的所有颗粒总数中占50%以上。<br><br>1纳米等于十亿分之一米。在纳米尺度上，一些材料具有很多特殊功能。纳米材料已在人们的工作和生活中得到广泛应用。<br><br>欧盟委员会解释说，目前全世界关于纳米材料的定义很多，争论很大，但随着这种材料的日益普及，其定义混乱带来很多不便。18日通过的这一定义综合了权威的科研成果，并且简单易行。<br><br>不过，欧委会也承认，这一定义还有不完善之处，并因此决定在2014年根据科技的发展和定义的实际实施情况修订这一定义。 <div><font color="#808080" size="2"><img 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