Development of a carboxyl-terminated indium tin oxide electrode for improving cell adhesion and facilitating low noise, real-time impedance measurements
| Autor: | Lin Oo Saw, Arul Lenus Roy Vellaisamy, Jamal-Deen Musah, Shishir Venkatesh, Chi-Chung Yeung, A. M. Olabisi Ilyas, Condon Lau, Kowsar Alam, Mengsu Yang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Working electrode Physiology 02 engineering and technology Biosensing Techniques CHO Cells 010402 general chemistry 01 natural sciences Signal Cricetulus Cell Movement Cell Adhesion Electric Impedance Animals Cell adhesion Electrical impedance Electrodes business.industry Tin Compounds Cell Biology 021001 nanoscience & nanotechnology 0104 chemical sciences Dielectric spectroscopy Low noise Indium tin oxide Electrode Optoelectronics 0210 nano-technology business |
| Zdroj: | American journal of physiology. Cell physiology. 320(6) |
| ISSN: | 1522-1563 |
| Popis: | The working electrode’s surface property is crucial to cell adhesion and signal collection in electric cell-substrate impedance sensing (ECIS). To date, the indium tin oxide (ITO)-based working electrode is of interest in ECIS study due to its high transparency and biocompatibility. Of great concern is the impedance signal loss, distortion, and data interpretation conflict profoundly created by the movement of multiple cells during ECIS study. Here, a carboxyl-terminated ITO substrate was prepared by stepwise surface amino silanization, with N-hydroxy succinimide (NHS) and 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide hydrochloride (EDC) treatment, respectively. We investigated the stepwise changes in the property of the treated ITO, cell-substrate adhesion, collective cell mobility, and time course of change in absolute impedance from multiple Chinese hamster ovary (CHO) cells [(Δt-Δ|Z|)CELLS]. The carboxyl-terminated ITO substrate with a surface roughness of 6.37 nm shows enhanced conductivity, 75% visible light transparency, improved cell adherence, reduced collective cell migration speed by approximately twofold, and diminished signal distortion in the [(Δt-Δ|Z|)CELLS]. Thus, our study provides an ITO surface-treatment strategy to reduce multiple cell movement effects and to obtain essential cell information from the ECIS study of multiple cells through undistorted (Δt-Δ|Z|)CELLS. |
| Databáze: | OpenAIRE |
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