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Caption : figure s1. characterization of deposited pedot:pss layer versus ito base
a) chronopotentiometric recording (continouos line) during galvanostatic electrodeposition (dashed line) of edot with pss counterions in aqueous solution (mean ± sd, n = 21). b) uv-vis spectroscopy of ito (red) and pedot (blue) surfaces in unbiased (continouos line),  oxidated at +1.5 v potential (dashed line) and reduced at -1.5 v potential (dotted line) state (mean only for purpose of clarity, n = 6) c) sheet resistance of ito (red) and electrodeposited pedot:pss (blue), (mean ± sd, n = 6). d) wettability as determined by contact angle measurement of ito (red) and electrodeposited pedot:pss (blue), (mean ± sd, n = 6). e) electrochemical impedance spectroscopy of ito (red) and electrodeposited pedot:pss (blue) at 0.1 hz – 100 khz in pbs electrolyte (mean ± sd, n = 4). f) cyclic voltammetry with 0.1 v/s to determine charge transfer capacity of ito (red) and electrodeposited pedot:pss (blue) in pbs electrolyte (4 cycles, shown are cycles 2 – 4, mean, n = 6).


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Caption : figure s2. pas spectra using fully supplemented dmem as electrolyte.  
(a) control experiments using supplemented dmem medium only (no cells). full pas spectra were recorded hourly for 70 h. spectra are displayed as bode plot with colour-coded time parameter. (b) close-up of the frequency range 103-105 hz.


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Caption : figure s3. epithelial monolayer disruption by full spectra pas sensing.
(a) a confluent mdck monolayer was treated with 20 µl dmso after 30 min baseline recording and full pas spectra were  recorded for 90 min in total. (b) a confluent mdck monolayer was treated with 20 µl ionomycine (1 mg ml-1) in dmso after 30 min baseline recording and full pas spectra were recorded for 90 min in total. (c) close ups
spectra are displayed as bode plot with colour-coded time parameter. (c) close-up of the φ peak amplitude in the 103-105 hz frequency range for dmso and ionomycin treated cell layers. (d) extracted and normalized φ peak amplitudes obtained from full pas spectra for mdck monolayers treated with ionomycin (full circles) and dmso (open circles) after 30 min baseline recording indicating the confluency of the mdck monolayer (n = 3). 


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Caption : figure s3. epithelial monolayer disruption by full spectra pas sensing.
(a) a confluent mdck monolayer was treated with 20 µl dmso after 30 min baseline recording and full pas spectra were  recorded for 90 min in total. (b) a confluent mdck monolayer was treated with 20 µl ionomycine (1 mg ml-1) in dmso after 30 min baseline recording and full pas spectra were recorded for 90 min in total. (c) close ups
spectra are displayed as bode plot with colour-coded time parameter. (c) close-up of the φ peak amplitude in the 103-105 hz frequency range for dmso and ionomycin treated cell layers. (d) extracted and normalized φ peak amplitudes obtained from full pas spectra for mdck monolayers treated with ionomycin (full circles) and dmso (open circles) after 30 min baseline recording indicating the confluency of the mdck monolayer (n = 3).