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<div class="ss"><div><span>导读： </span>据外媒报道，科学家此前估计地球深处或有千万亿吨钻石。在科学应用中，钻石可用作坚固的保护涂层和光学设备，但它在地球上的相对稀有性使其难以获得。</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"><div> 据外媒报道，科学家此前估计地球深处或有千万亿吨钻石。在科学应用中，钻石可用作坚固的保护涂层和光学设备，但它在地球上的相对稀有性使其难以获得。现在，北卡罗来纳州立大学（NCSU）的研究人员已经展示了一种将碳<a href="http://material.oecr.com" target="_blank" class="relatedlink">纳米</a>纤维和纳米管转化为钻石纤维的新方法，这种方法可以比现有技术更容易在实验室中进行。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201901/26/094909mctilhrrzpp2uhvt.jpg" target="_blank"><img src="data/attachment/portal/201901/26/094909mctilhrrzpp2uhvt.jpg"></a></p></div><div><br></div><div> 在自然界中，钻石是在地球深处锻造的，在那里碳受到高压和高温的影响，因此制造它们的人造方法需要类似的条件才能发挥作用。并且涉及该过程的设备可能非常麻烦且耗能。相比之下，NCSU团队开发的新技术显然可以在室温和常压下完成。首先，碳纳米纤维被持续仅100纳秒的<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>脉冲击中，立即将碳加热到约3727°C（6740°F）并融化。</div><div><br></div><div> 通常，热量足以蒸发碳，这显然不是理想的结果。为了阻止这种情况，该团队使用了蓝宝石、玻璃或塑料聚合物基材，这足以限制热流以防止相变。然后快速冷却<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>，使其结晶成钻石。</div><div><br></div><div> 这个过程可以创建用于<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>甚至量子计算机的钻石纳米纤维，或者用碳纳米纤维来获得小钻石。在后者的情况下，可以使用化学气相沉积等更传统的技术来制造更大的钻石结构。以这种方式创造的结构可能最终成为增强工具或珠宝的涂层。</div><div><br></div><div> 该研究发表在《Nanoscale》杂志上。</div><div><br></div><div><br></div><div><p microsoft="" yahei",="" simsun;="" rgb(255,="" 255,="" 255);="" center;"="" 255);"="" background-color:="" style="text-align: center; word-wrap: normal; margin: 0px; padding: 0px; color: rgb(143, 143, 143); font-family: Tahoma, "Microsoft Yahei", Simsun; background-color: rgb(255, 255, 255);"><b microsoft="" yahei",="" simsun;="" normal;"="" style="word-wrap: normal;"><font size="5" style="word-wrap: 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