Pseudo-topotactic conversion of carbon nanotubes to T-carbon nanowires under picosecond laser irradiation in methanol.
Pseudo-topotactic conversion of carbon nanotubes to T-carbon nanowires under picosecond laser irradiation in methanol.
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DOI：
10.1038/s41467-017-00817-9
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发表时间：
2017-09-25
影响因子：
16.6
通讯作者：
Niu C
中科院分区：
文献类型：
--
作者：
Zhang J;Wang R;Zhu X;Pan A;Han C;Li X;Dan Zhao;Ma C;Wang W;Su H;Niu C
将碳纳米管伪拓扑转化为一维碳纳米线是获得所需直径和形态的具有挑战性但可行的途径。在此，通过皮秒脉冲激光照射对甲醇中的多壁碳纳米管悬浮液进行伪拓扑转化，产生了一种先前预测但实验上未观察到的碳同素异形体 T-碳。生长的T-碳纳米线具有与原始碳纳米管相同的直径分布，并通过高分辨率透射电子显微镜、快速傅里叶变换、电子能量损失、紫外-可见光和光致发光光谱进行表征，具有类金刚石晶格，其中每个碳都被碳四面体取代，晶格常数为7.80 Å。从碳纳米管到T-碳的熵变揭示了相变本质上是一级的。计算出的电子能带结构和投影态密度与T-碳纳米线的光学吸收和光致发光光谱非常一致。 T-碳是一种先前预测但迄今为止尚未观察到的碳同素异形体，其晶体结构类似于金刚石，但每个原子晶格位置都被碳四面体取代。在这里，作者通过激光照射甲醇中的碳纳米管悬浮液来生产 T-碳纳米线。
Pseudo-topotactic conversion of carbon nanotubes into one-dimensional carbon nanowires is a challenging but feasible path to obtain desired diameters and morphologies. Here, a previously predicted but experimentally unobserved carbon allotrope, T-carbon, has been produced from pseudo-topotactic conversion of a multi-walled carbon nanotube suspension in methanol by picosecond pulsed-laser irradiation. The as-grown T-carbon nanowires have the same diameter distribution as pristine carbon nanotubes, and have been characterized by high-resolution transmission electron microscopy, fast Fourier transform, electron energy loss, ultraviolet–visible, and photoluminescence spectroscopies to possess a diamond-like lattice, where each carbon is replaced by a carbon tetrahedron, and a lattice constant of 7.80 Å. The change in entropy from carbon nanotubes to T-carbon reveals the phase transformation to be first order in nature. The computed electronic band structures and projected density of states are in good agreement with the optical absorption and photoluminescence spectra of the T-carbon nanowires. T-carbon is a previously predicted but so far unobserved allotrope of carbon, with a crystal structure similar to diamond, but with each atomic lattice position replaced by a carbon tetrahedron. Here, the authors produce T-carbon nanowires via laser-irradiating a suspension of carbon nanotubes in methanol.
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影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
通过控制晶体结构和形貌合成的 MoS2 和 WS2 碳纳米管杂化物
影响因子：
10.9
作者：
Li, Xin;Wang, Zhenyu;Niu, Chunming
通讯作者：
Niu, Chunming
影响因子：
3.8
作者：
Liu, P.;Cui, H.;Yang, G. W.
通讯作者：
Yang, G. W.
DOI：
10.1073/pnas.0510489103
发表时间：
2006-01-31
影响因子：
11.1
作者：
Correa, AA;Bonev, SA;Galli, G
通讯作者：
Galli, G
影响因子：
41.2
作者：
Chuvilin, A.;Bichoutskaia, E.;Khlobystov, A. N.
通讯作者：
Khlobystov, A. N.