. Author manuscript; available in PMC: 2022 Sep 22.

Published in final edited form as: Sci Transl Med. 2021 Sep 22;13(612):eabf8629. doi: 10.1126/scitranslmed.abf8629

Table 1. Summary of electrochemical properties of planar MXtrodes of varying diameters, compared to a 2 mm-diameter Pt electrode contact.

For each type of electrode, N=10 for |Z| values and N=5 for CSC_C and CIC_C values.

Material	Electrode diameter	1 kHz \|Z\| in PBS (Ω)	10 Hz \|Z\| in PBS (Ω)	Potential Limits vs. Ag/AgCl (V)	CSC_C (mC cm⁻²)	CIC_C (mC cm⁻²)
MXene	3 mm	205.6 ± 11.1	241.4 ± 14.7	−1.7 –0.6	157.9 ± 19.6	0.53 ± 0.08
	2 mm	369.2 ± 40.2	451.2 ± 35.4	−1.7 –0.6	306.3 ± 35.2	0.67 ± 0.03
	1 mm	430.2 ± 86.1	644.2 ± 97.3	−1.7 –0.6	607.8 ± 90.2	1.02 ± 0.07
	500 μm	729.2 ± 71.2	1343.3 ± 81.6	−1.7 –0.6	1495.3 ± 60.5	2.01 ± 0.46
Pt	2 mm	301.7 ± 77.6	8918.3 ± 1147.7	−0.6 –0.8	4.4 ± 0.7	0.05 ± 0.001