Ionic liquid flow along the carbon nanotube with DC electric field
SCIE
SCOPUS
- Title
- Ionic liquid flow along the carbon nanotube with DC electric field
- Authors
- Jung Hwal Shin; Geon Hwee Kim; Intae Kim; Hyungkook Jeon; Taechang An; Lim, G
- Date Issued
- 2015-07-02
- Publisher
- Nature Publishing Group
- Abstract
- Liquid pumping can occur along the outer surface of an electrode under a DC electric field. For biological applications, a better understanding of the ionic solution pumping mechanism is required. Here, we fabricated CNT wire electrodes (CWEs) and tungsten wire electrodes (TWEs) of various diameters to assess an ionic solution pumping. A DC electric field created by a bias of several volts pumped the ionic solution in the direction of the negatively biased electrode. The resulting electroosmotic flow was attributed to the movement of an electric double layer near the electrode, and the flow rates along the CWEs were on the order of picoliters per minute. According to electric field analysis, the z-directional electric field around the meniscus of the small electrode was more concentrated than that of the larger electrode. Thus, the pumping effect increased as the electrode diameter decreased. Interestingly in CWEs, the initiating voltage for liquid pumping did not change with increasing diameter, up to 20 mu m. We classified into three pumping zones, according to the initiating voltage and faradaic reaction. Liquid pumping using the CWEs could provide a new method for biological studies with adoptable flow rates and a larger 'Recommended pumping zone'.
- Keywords
- FOG COLLECTION; DROPLETS; WATER; NANOFLUIDICS; NANOPIPES; TRANSPORT; DELIVERY; WIRE
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13440
- DOI
- 10.1038/SREP11799
- ISSN
- 2045-2322
- Article Type
- Article
- Citation
- Scientific Reports, vol. 5, 2015-07-02
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