Pseudo-topotactic conversion of carbon nanotubes to T-carbon nanowires under picosecond laser irradiation in methanol

被引:202
作者
Zhang, Jinying [1 ]
Wang, Rui [1 ]
Zhu, Xi [2 ]
Pan, Aifei [3 ]
Han, Chenxiao [1 ]
Li, Xin [1 ]
Zhao, Dan [1 ]
Ma, Chuansheng [4 ,5 ]
Wang, Wenjun [3 ]
Su, Haibin [2 ]
Niu, Chunming [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Ctr Nanomat Renewable Energy, Xian 710054, Shaanxi, Peoples R China
[2] Nanyang Technol Univ, Inst Adv Studies, Div Mat Sci, 50 Nanyang Ave, Singapore 639798, Singapore
[3] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710054, Shaanxi, Peoples R China
[4] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Shaanxi, Peoples R China
[5] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China
来源
NATURE COMMUNICATIONS | 2017年 / 8卷
基金
中国国家自然科学基金;
关键词
AUGMENTED-WAVE METHOD; ELECTRONIC-PROPERTIES; IN-SITU; DIAMOND; PHASE; TRANSFORMATION; HYBRIDS; MOS2; C-8;
D O I
10.1038/s41467-017-00817-9
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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 angstrom. 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.
引用
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页数:7
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