Dielectrophoretic separation of carbon nanotubes and polystyrene microparticles
Dielectrophoretic separation of carbon nanotubes and polystyrene microparticles
复制标题
碳纳米管与聚苯乙烯微粒的介电泳分离
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
K. Klantar
中科院分区：
文献类型：
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作者：
C. Zhang;K. Khoshmanesh;F. Tovar;A. Mitchell;W. Wlodarski;K. Klantar
采用介电泳法(DEP)分离多壁碳纳米管(MWCNTs)和聚苯乙烯微粒。DEP系统由在玻璃衬底上形成图案的平行微电极阵列组成。通过数值仿真对系统的性能进行了评估。MWCNTs表现出正的DEP行为，并且可以被捕获在高电场区域。然而，聚苯乙烯微粒在一定的频率范围内表现出负的DEP行为，并迁移到低电场区域。在100 MHz到1 MHz的频率下对微粒进行实验，以估计它们的交叉频率并选择分离频率的范围。进一步，在获得的分离频率范围内进行了多壁碳纳米管和聚苯乙烯微粒的分离实验。
The separation of multi-walled carbon nanotubes (MWCNTs) and polystyrene microparticles using a dielectrophoresis (DEP) system is presented. The DEP system consists of arrays of parallel microelectrodes patterned on a glass substrate. The performance of the system is evaluated by means of numerical simulations. The MWCNTs demonstrate a positive DEP behaviour and can be trapped at the regions of high electric field. However, the polystyrene microparticles demonstrate a negative DEP behaviour at a certain range of frequencies and migrate to the regions of low electric field. Experiments are performed on the microparticles at the frequencies between 100 Hz and 1 MHz to estimate their crossover frequency and select the range of separation frequencies. Further, experiments are conducted at the obtained range of separation frequencies to separate the MWCNTs and polystyrene microparticles.