Renewable and Optically Transparent Electroactive Indium Tin Oxide Surfaces for Chemoselective Ligand Immobilization and Biospecific Cell Adhesion

Langmuir ◽  
2008 ◽  
Vol 24 (22) ◽  
pp. 13096-13101 ◽  
Author(s):  
Wei Luo ◽  
Nathan P. Westcott ◽  
Abigail Pulsipher ◽  
Muhammad N. Yousaf
Author(s):  
A.M. Ilyas ◽  
Md Kowsar Alam ◽  
Jamal-Deen Musah ◽  
Lin Oo SAW ◽  
Chi-Chung Yeung ◽  
...  

The working electrode's surface property is crucial to cell adhesion and signal collection in electric cell-substrate impedance spectroscopy (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 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 ~2 fold, 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


Langmuir ◽  
2001 ◽  
Vol 17 (14) ◽  
pp. 4360-4366 ◽  
Author(s):  
Aiping Fang ◽  
HouTee Ng ◽  
Sam Fong Yau Li

2010 ◽  
Vol 131 (1-3) ◽  
pp. 401-406 ◽  
Author(s):  
Sezin Galioğlu ◽  
Mariam N. Ismail ◽  
Juliusz Warzywoda ◽  
Albert Sacco ◽  
Burcu Akata

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