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Microstructural evolution of carbon nanotube fibers: deformation and strength mechanism.
Liu, Xia,Lu, Weibang,Ayala, Orlando M,Wang, Lian-Ping,Karlsson, Anette M,Yang, Qingsheng,Chou, Tsu-Wei RSC Pub 2013 Nanoscale Vol.5 No.5
<P>A comprehensive investigation of the mechanical behavior and microstructural evolution of carbon nanotube (CNT) continuous fibers under twisting and tension is conducted using coarse-grained molecular dynamics simulations. The tensile strength of CNT fibers with random CNT stacking is found to be higher than that of fibers with regular CNT stacking. The factor dominating the mechanical response of CNT fibers is identified as individual CNT stretching. A simplified twisted CNT fiber model is studied to illustrate the structural evolution mechanisms of CNT fibers under tension. Moreover, it is demonstrated that CNT fibers can be reinforced by enhancing intertube interactions. This study would be helpful not only in the general understanding of the nano- and micro-scale factors affecting CNT fibers' mechanical behavior, but also in the optimal design of CNT fibers' architecture and performance.</P>
Assembling Synthesis of Barium Chromate Nano-superstructures Using Eggshell Membrane as Template
Jinku Liu,Qingsheng Wu,Yaping Ding,Yu Yi 대한화학회 2004 Bulletin of the Korean Chemical Society Vol.25 No.12
The branch-like, feather-like BaCrO4 nano-superstructures were synthesized with bioactive eggshell membrane as directing and assembly template. Studies on the two products revealed that they formed through the self-assembly of nanoparticles, and that the optical properties of the products were different from BaCrO4 bulk materials.