期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 115, 期 46, 页码 11718-11723出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1810827115
关键词
soft conductive hydrogel microelectrode; electrophysiological recording; micropillar electrode
资金
- Bio-X Interdisciplinary Initiatives Seed Grant
- National Institutes of Health [R01-GM125737]
- National Science Foundation [ECCS-1542152]
- National Science Scholarship (A*STAR, Singapore)
- Stanford Bio-X Graduate Fellowship
Multielectrode arrays (MEAs) are essential tools in neural and cardiac research as they provide a means for noninvasive, multiplexed recording of extracellular field potentials with high temporal resolution. To date, the mechanical properties of the electrode material, e.g., its Young's modulus, have not been taken into consideration in most MEA designs leaving hard materials as the default choice due to their established fabrication processes. However, the cell-electrode interface is known to significantly affect some aspects of the cell's behavior. In this paper, we describe the fabrication of a soft 3D micropillar electrode array. Using this array, we proceed to successfully record action potentials from monolayer cell cultures. Specifically, our conductive hydrogel micropillar electrode showed improved signal amplitude and signal-to-noise ratio, compared with conventional hard iridium oxide micropillar electrodes of the same diameter. Taken together, our fabricated soft micropillar electrode array will provide a tissuelike Young's modulus and thus a relevant mechanical microenvironment to fundamental cardiac and neural studies.
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