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A complementary impedance spectroscopy biosensing method with graphene
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DOI：10.1016/j.bios.2026.118679.png)
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Abstract
En 中文
• Sensitive detection of analyte-induced changes via complex AC impedance of graphene channel, Z=X+iY. • This approach parallels classical Electrochemical Impedance Spectroscopy (EIS), but with current flowing laterally along the graphene channel rather than through the electrolyte between EIS electrodes. • A novel metric, Y/X2, has been introduced. This metric demonstrates excellent baseline stability, making it well-suited for reliable biomarker detection in graphene biosensors.
Keywords:
Graphene field-effect transistor
AC impedance
Y/X2-metric
Baseline stability
Functional-layer capacitance
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