Tissue-susceptibility matched carbon nanotube electrodes for magnetic resonance imaging
| Autor: | Robert C. Davis, Ileana Hancu, Craig Patrick Galligan, Berg Dodson, Richard Vanfleet, Jeffrey Michael Ashe, Wanming Zhang, Christopher Michael Puleo, Eric Fiveland, Guohai Chen, Francis Johnson |
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| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Biophysics chemistry.chemical_element 02 engineering and technology Carbon nanotube Biochemistry Reference electrode Imaging phantom law.invention 03 medical and health sciences 0302 clinical medicine Electrical resistivity and conductivity law business.industry 021001 nanoscience & nanotechnology Condensed Matter Physics Magnetic susceptibility chemistry Electrode Optoelectronics 0210 nano-technology business Carbon 030217 neurology & neurosurgery Microfabrication |
| Zdroj: | Journal of Magnetic Resonance. 295:72-79 |
| ISSN: | 1090-7807 |
| Popis: | Test disk electrodes were fabricated from carbon nanotubes (CNT) using the Carbon Nanotube Templated Microfabrication (CNT-M) technique. The CNT-M process uses patterned growth of carbon nanotube forests from surfaces to form complex patterns, enabling electrode sizing and shaping. The additional carbon infiltration process stabilizes these structures for further processing and handling. At a macroscopic scale, the electrochemical, electrical and magnetic properties, and magnetic resonance imaging (MRI) characteristics of the disk electrodes were investigated; their microstructure was also assessed. CNT disk electrodes showed electrical resistivity around 1 Ω·cm, charge storage capacity between 3.4 and 38.4 mC/cm2, low electrochemical impedance and magnetic susceptibility of −5.9 to −8.1 ppm, closely matched to that of tissue (∼−9 ppm). Phantom MR imaging experiments showed almost no distortion caused by these electrodes compared with Cu and Pt-Ir reference electrodes, indicating the potential for significant improvement in accurate tip visualization. |
| Databáze: | OpenAIRE |
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