Electric-Field-Induced Dispersion of Multiwalled Carbon Nanotubes in Nematic Liquid Crystal
Electric-Field-Induced Dispersion of Multiwalled Carbon Nanotubes in Nematic Liquid Crystal
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DOI：
10.1021/jp206961a
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发表时间：
2011-10
影响因子：
3.7
通讯作者：
Weiwei Tie;Gyu Hyung Yang;S. Bhattacharyya;Y. H. Lee;S. H. Lee
中科院分区：
文献类型：
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作者：
Weiwei Tie;Gyu Hyung Yang;S. Bhattacharyya;Y. H. Lee;S. H. Lee
研究了电场和频率对多壁碳纳米管在液晶介质中分散性的影响。在零场，大的MWCNT聚集体被发现，由于在整个细胞在光学显微镜下的分散不足。随着垂直电场强度的逐渐增大，团簇尺寸逐渐减小，当电场强度超过临界值时，团簇消失并最终分散到液晶介质中。CNT簇的分散体即使在去除场之后也保持稳定。还观察到团簇大小与场强的强相关性。光吸收也证实了在临界电场以上团簇的分散性。CNT的场诱导分散的这种鲁棒性提供了改善CNT在LC介质中的溶解度的新方法，这在许多CNT-LC光电器件中是有利的。
Effect of electric field and frequency on multiwalled carbon nanotubes (MWCNTs) dispersion in liquid crystal (LC) medium has been investigated. At zero field, large MWCNT aggregates are found due to insufficient dispersion throughout the cell under optical microscopy. As the vertical field strength increases gradually, the cluster sizes become smaller, and at above critical field strength, the clusters disappear and are dispersed finally into LC medium. The dispersion of CNT clusters remained stable even after the field is removed. Strong correlation of cluster sizes with field strength was also observed. The dispersion of clusters at above critical field was also confirmed by the light absorption. This robustness of field-induced dispersion of CNTs provides a new method of improving solubility of CNTs in LC medium, which can be advantageous in numerous CNT-LC optoelectronic devices.