Ultrasensitive electrochemical determination of the cancer biomarker protein sPD-L1 based on a BMS-8-modified gold electrode

[Display omitted] •Gold electrodes were modified by BMS-8 to detect PD-L1 protein.•The XPS, contact angle and SFE measurements confirmed electrode modification.•The LOD for PD-L1 and PD-1 is below 3 × 10−14 M using impedance method.•Assay selectivity may be assessed by frequency dispersion of capaci...

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