Integration of Single Multi-Walled Carbon Nanotube on Micro Systems

2002 ◽  
Author(s):  
Jaehyun Chung ◽  
Junghoon Lee ◽  
Rodney S. Ruoff ◽  
Wing Kam Liu
Keyword(s):  
Carbon Nanotube ◽  
Electric Field ◽  
Frequency Component ◽  
Metal Electrodes ◽  
New Techniques ◽  
Ac Electric Field ◽  
Multi Walled Carbon Nanotube ◽  
Assembly Technique ◽  
Dc Component ◽  
Micro Systems

This paper presents new techniques for depositing single multi-walled carbon nanotube (MWCNT) on metal electrodes based on micro-fabrication and an electric-field-guided assembly technique. It was demonstrated that a single MWCNT can be directionally deposited across a microscale gap guided by a biased AC electric field. The biased AC method could effectively avoid the deposition of undesirable particles, and yet maintained highly ordered deposition results. A specific AC frequency component was applied to attract only desired CNTs into a gap and a DC component was used to diminish electric field significantly when the first CNT is deposited. This method can be easily combined with other micromachining process and possibly applied to batch production.

FABRICATION OF DISPERSED ALIGNED CARBON NANOTUBE ARRAY BETWEEN METAL ELECTRODES

2006 ◽  
Vol 05 (04n05) ◽  
pp. 389-394
Author(s):  
CHANGXIN CHEN ◽  
YAFEI ZHANG
Keyword(s):  
Carbon Nanotube ◽  
Electric Field ◽  
High Frequency ◽  
Metal Electrodes ◽  
Nanotube Array ◽  
Carbon Nanotube Array ◽  
Ac Electric Field ◽  
High Volatility ◽  
Surface Decoration ◽  
High Frequency Ac

Dispersed aligned single-wall carbon nanotube (SWCNT) array has been formed between electrodes by electric field assisted alignment of surface decorated SWCNTs. The surface decoration of SWCNTs with functional molecules allows them to dispersedly bridge metal electrodes and effectively obviates the entanglement between SWCNTs. The influences of solution volatility and electric-field type on the alignment are investigated. It is indicated that the well-oriented SWCNT array can be achieved by using the high-volatility solvent and the high-frequency AC electric field to align SWCNTs.

scholarly journals The Electric-Field-Driven Fusion Jetting 3D Printing for Fabricating High Resolution Polylactic Acid/Multi-Walled Carbon Nanotube Composite Micro-Scale Structures

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1132
Author(s):  
Xiaoqiang Li ◽  
Guangming Zhang ◽  
Wenhai Li ◽  
Zun Yu ◽  
Kun Yang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
High Resolution ◽  
3D Printing ◽  
Electric Field ◽  
Polylactic Acid ◽  
Line Width ◽  
Micro Scale ◽  
Biomimetic Scaffolds ◽  
Multi Walled Carbon Nanotube ◽  
Scale Structures

Existing 3D printing techniques are still facing the challenge of low resolution for fabricating polymer matrix composites, inhibiting the wide engineering applications for the biomedical engineering (biomimetic scaffolds), micro fuel cells, and micro-electronics. In order to achieve high resolution fabrication of polylactic acid (PLA)/multi-walled carbon nanotube (MWCNT) composites, this paper presents an electric-field-driven (EFD) fusion jetting 3D printing method by combining the mixing effect and material feeding of the micro-screw and the necking effect of Taylor cone by the EFD. The effects of main process parameters (the carbon loading, the voltage, the screw speed, and the printing speed) on the line width and the printing quality were studied and optimized. To demonstrate the printing capability of this proposed method, meshes with line width of 30 µm to 100 μm and 1 wt.% to 5 wt.% MWCNT for the application of conductive biomimetic scaffold and the anisotropic flexible meshes were prepared. The electrical properties were investigated to present the frequency dependence of the alternating current conductivity and the dielectric loss (tanδ), and the microstructures of printed structures demonstrated the uniformly dispersed MWCNT in PLA matrix. Therefore, it provides a new solution to fabricate micro-scale structures of composite materials, especially the 3D conductive biomimetic scaffolds.

Electrowetting on a multi-walled carbon nanotube membrane with different droplet sizes in an electric field

2016 ◽  
Vol 51 (8) ◽  
pp. 4031-4036 ◽  
Author(s):  
Wenbin Cui ◽  
Hongbin Ma ◽  
Bohan Tian ◽  
Yulong Ji ◽  
Fengmin Su
Keyword(s):  
Carbon Nanotube ◽  
Electric Field ◽  
Multi Walled Carbon Nanotube ◽  
Droplet Sizes

Dual stimulus responsive drug release under the interaction of pH value and pulsatile electric field for a bacterial cellulose/sodium alginate/multi-walled carbon nanotube hybrid hydrogel

RSC Advances ◽  
2015 ◽  
Vol 5 (52) ◽  
pp. 41820-41829 ◽  
Author(s):  
Xiangning Shi ◽  
Yudong Zheng ◽  
Cai Wang ◽  
Lina Yue ◽  
Kun Qiao ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Carbon Nanotube ◽  
Drug Release ◽  
Electric Field ◽  
Bacterial Cellulose ◽  
Sodium Alginate ◽  
Ph Value ◽  
Hybrid Hydrogel ◽  
Multi Walled Carbon Nanotube ◽  
Stimulus Responsive

Hydrogels synthesized by SA, BC and MWCNTs was a pH and electric responsive drug delivery system. The combination stimuli-releasing had selectivity for the pH value. Pulsatile releasing pattern was also had selectivity for the pH value.

AC Dielectrophoresis Alignment of ZnO Nanowires and Subsequent Use in Field-Effect Transistors

2008 ◽  
Vol 8 (7) ◽  
pp. 3473-3477 ◽  
Author(s):  
Sang-Kwon Lee ◽  
Seung-Yong Lee ◽  
Jung-Hwan Hyung ◽  
Chan-Oh Jang ◽  
Dong-Joo Kim ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Drain Current ◽  
Zno Nanowires ◽  
Excellent Performance ◽  
Metal Electrodes ◽  
Yield Rate ◽  
Ac Electric Field

We report on the dielectrophoresis (DEP) characterization of single crystalline zinc oxide (ZnO) nanowires with variations of the AC electric field and frequency. The alignment yield rate of ZnO nanowires in the gap over the 200 metal electrodes increased with increasing AC electric field and also changed by the applying frequency. Moreover, we demonstrated that the DEP prepared multi-ZnO nanowires field-effect transistors (FETs) exhibited excellent performance with a transconductance of ∼3 μS and a high drain current of ∼2.7 × 10−6 A (VDS = 5 V, VG = 20 V).

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