Ultrahigh Torsional Stiffness and Strength of Boron Nitride Nanotubes

Ultrahigh Torsional Stiffness and Strength of Boron Nitride Nanotubes
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DOI:
10.1021/nl303601d
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发表时间:
2012-12-01
期刊:
影响因子:
10.8
通讯作者:
Joselevich, Ernesto
Joselevich, Ernesto
中科院分区:
材料科学1区
文献类型:
--
作者:
Garel, Jonathan;Leven, Itai;Joselevich, Ernesto

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我们报告了氮化硼纳米管(BNNT)扭转力学的实验和理论研究。我们发现 BNNT 表现出比碳纳米管 (CNT) 更强的机械层间耦合。这一特性使得 BNNT 的硬度和强度比 CNT 提高了 1 个数量级。我们将这种层间锁定归因于 BNNT 的多面性质,这是由 B-N 键的极性引起的。这一特性使 BNNT 成为纳米机电系统 (NEMS)、纤维和纳米复合材料中碳纳米管的绝佳替代品。
We report the experimental and theoretical study of boron nitride nanotube (BNNT) torsional mechanics. We show that BNNTs exhibit a much stronger mechanical interlayer coupling than carbon nanotubes (CNTs). This feature makes BNNTs up to 1 order of magnitude stiffer and stronger than CNTs. We attribute this interlayer locking to the faceted nature of BNNTs, arising from the polarity of the B-N bond. This property makes BNNTs superior candidates to replace CNTs in nanoelectromechanical systems (NEMS), fibers, and nanocomposites.