Real-time gap impedance monitoring of dielectrophoretic assembly of multiwalled carbon nanotubes

被引：23

作者：

An, Libao ^{[1
]}

Friedrich, Craig R. ^{[1
]}

机构：

[1] Michigan Technol Univ, Multiscale Technol Inst, Dept Mech Engn Engn Mech, Houghton, MI 49931 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 17期

关键词：

D O I：

10.1063/1.2918016

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on a real-time monitoring method for the assembly of a small number of multiwalled carbon nanotubes (MWNTs) by dielectrophoresis (DEP). A time-varying impedance model was developed to estimate the number of MWNTs which span an electrode gap indicated by the instantaneous decrease of gap impedance during DEP. Sudden decreases in gap impedance signals corresponding to tube deposition were measured. The impedance values agreed with the impedance model. Experiments confirmed that DEP assembly and measurement of gap impedance changes due to tube deposition can be accomplished with a single instrument, also providing a feedback signal for DEP process control. (c) 2008 American Institute of Physics.

引用

页数：3

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