科学家设计出比钻石更硬的物质
<p><span word="Scientists">Scientists</span> <span word="have">have</span> <span word="found">found</span> <span word="a">a</span> <span word="new">new</span> <span word="way">way</span> <span word="to">to</span> <span word="structure">structure</span> <span word="carbon">carbon</span> <span word="at">at</span> <span word="the">the</span> <span word="nanoscale">nanoscale</span>, <span word="making">making</span> <span word="a">a</span> <span word="material">material</span> <span word="that">that</span>'<span word="s">s</span> <span word="superior">superior</span> <span word="to">to</span> <span word="diamond">diamond</span> <span word="on">on</span> <span word="the">the</span> <span word="strength">strength</span>-<span word="to">to</span>-<span word="density">density</span> <span word="ratio">ratio</span>.</p><p>科学家发现了一种新的方法构造纳米级碳，做出了一种在强度密度比上优于钻石的物质。</p><p><span word="While">While</span> <span word="the">the</span> <span word="tiny">tiny</span> <span word="carbon">carbon</span> <span word="lattice">lattice</span> <span word="has">has</span> <span word="been">been</span> <span word="fabricated">fabricated</span> <span word="and">and</span> <span word="tested">tested</span> <span word="in">in</span> <span word="the">the</span> <span word="lab">lab</span>, <span word="it">it</span>'<span word="s">s</span> <span word="a">a</span> <span word="very">very</span> <span word="long">long</span> <span word="way">way</span> <span word="off">off</span> <span word="practical">practical</span> <span word="use">use</span>. <span word="But">But</span> <span word="this">this</span> <span word="new">new</span> <span word="approach">approach</span> <span word="could">could</span> <span word="help">help</span> <span word="us">us</span> <span word="build">build</span> <span word="stronger">stronger</span> <span word="and">and</span> <span word="lighter">lighter</span> <span word="materials">materials</span> <span word="in">in</span> <span word="the">the</span> <span word="future">future</span> - <span word="which">which</span> <span word="is">is</span> <span word="something">something</span> <span word="that">that</span>'<span word="s">s</span> <span word="of">of</span> <span word="great">great</span> <span word="interest">interest</span> <span word="to">to</span> <span word="industries">industries</span> <span word="such">such</span> <span word="as">as</span> <span word="aerospace">aerospace</span> <span word="and">and</span> <span word="aviation">aviation</span>.</p><p>虽然做出了这种微碳晶格，在实验室中进行了测试，但还不能用于实际应用。但这种新的方法能帮我们在未来构造出更坚固更轻的物质，航空航天等行业对此会非常感兴趣。</p><p><span word="What">What</span> <span word="we">we</span>'<span word="re">re</span> <span word="talking">talking</span> <span word="about">about</span> <span word="here">here</span> <span word="is">is</span> <span word="something">something</span> <span word="known">known</span> <span word="as">as</span> <span word="a">a</span> <span word="nanolattices">nanolattices</span> - <span word="porous">porous</span> <span word="structures">structures</span> <span word="like">like</span> <span word="the">the</span> <span word="one">one</span> <span word="in">in</span> <span word="the">the</span> <span word="image">image</span> <span word="above">above</span> <span word="that">that</span>'<span word="s">s</span> <span word="made">made</span> <span word="up">up</span> <span word="of">of</span> <span word="three">three</span>-<span word="dimensional">dimensional</span> <span word="carbon">carbon</span> <span word="struts">struts</span> <span word="and">and</span> <span word="braces">braces</span>. <span word="Due">Due</span> <span word="to">to</span> <span word="their">their</span> <span word="unique">unique</span> <span word="structure">structure</span>, <span word="they">they</span>'<span word="re">re</span> <span word="incredibly">incredibly</span> <span word="strong">strong</span> <span word="and">and</span> <span word="lightweight">lightweight</span>.</p><p>我们讨论的是纳米晶格，这种多孔结构如上图所示，是由三维碳素支柱和支撑构成的。由于其结构独特，所以异常坚固轻便。</p><p><span word="Usually">Usually</span> <span word="these">these</span> <span word="nanolattices">nanolattices</span> <span word="are">are</span> <span word="based">based</span> <span word="around">around</span> <span word="a">a</span> <span word="cylindrical">cylindrical</span> <span word="framework">framework</span> (<span word="they">they</span>'<span word="re">re</span> <span word="called">called</span> <span word="beam">beam</span>-<span word="nanolattices">nanolattices</span>). <span word="But">But</span> <span word="the">the</span> <span word="team">team</span> <span word="has">has</span> <span word="now">now</span> <span word="created">created</span> <span word="plate">plate</span>-<span word="nanolattices">nanolattices</span>, <span word="structures">structures</span> <span word="based">based</span> <span word="around">around</span> <span word="tiny">tiny</span> <span word="plates">plates</span>.</p><p>通常这种纳米晶格是以圆柱形框架为基础的（我们称之为束纳米晶格）。但这个团队现在创造出了平板纳米晶格，是基于微型平板的结构。</p>
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