Low-impedance Tetrodes using Carbon Nanotube-Polypyrrole Composite Deposition
KCI
- Title
- Low-impedance Tetrodes using Carbon Nanotube-Polypyrrole Composite Deposition
- Authors
- 김민서; 신정활; Geunbae Lim
- Date Issued
- 2017-02
- Publisher
- 한국센서학회
- Abstract
- A tetrode is one of the neural electrodes, and it is widely used to record neural signals in the brain of a freely moving animal. The impedance of a neural electrode is an important parameter because it determines the signal-to-noise ratio of the recorded neuralsignals. Here, we developed a modification technique using carbon nanotube-polypyrrole composite nanostructures to decrease theimpedances of tetrodes. The synthesis of the carbon nanotube and polypyrrole nanostructures was performed in two steps. In the first step, randomly dispersed carbon nanotubes and pyrrole monomers were gathered and aligned on the tetrode electrode. Next, they were electro-polymerized on the electrode surface. As the applied time (step-1 and step-2) and the offset voltage increased, the impedances of the tetrodes decreased. The modification technique is, therefore, an important and useful of lowering the impedances of tetrodes.
- Keywords
- Tetrode; Carbon nanotube; Polypyrrole; Pyrrole monomer; Impedance
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50900
- DOI
- 10.5369/JSST.2017.26.2.73
- ISSN
- 1225-5475
- Article Type
- Article
- Citation
- 센서학회지, vol. 26, no. 2, page. 73 - 78, 2017-02
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