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Poly(3,4-ethylenedioxythiophene) Nanotube-Decorated Screen-Printed Electrodes with a Ferrocene-Derived Built-in Probe
I-Chen Wang1, Jayakrishnan Aerathupalathu Janardhanan1, Jia-Wei She1
1Smart Organic Materials Laboratory (SOML), Institute of Chemistry, Academia Sinica, No. 128, Sec. 2, Research Institute Road, Nankang, Taipei City 115201, Taiwan.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 27, 2026
Summary
A novel nanobiosensor electrode platform was developed for cost-effective liver cancer detection. This platform enables sensitive detection of alpha-fetoprotein (AFP) biomarker using screen-printed electrodes and advanced electropolymerization techniques.
Area of Science:
- * Electrochemistry and Nanomaterials Science
- * Biosensor Development
- * Biomarker Detection
Background:
- * Early detection of liver cancer is crucial for patient survival.
- * Alpha-fetoprotein (AFP) is a key biomarker for liver cancer diagnosis.
- * Existing detection methods can be expensive and complex.
Purpose of the Study:
- * To develop an easy-to-engineer and cost-effective nanobiosensor electrode platform.
- * To enable sensitive and selective detection of AFP.
- * To create a biosensor suitable for point-of-care testing (POCT).
Main Methods:
- * Modification of commercial screen-printed electrodes (SPEs) using electropolymerization.
- * Fabrication of a bilayer nanostructure with poly(EDOT-COOH-co-EDOT-EG3) and poly(EDOT-N3).
- * Conjugation of AFP antibody (AFP-Ab) and incorporation of an internal redox probe (ethynylferrocene).
- * Characterization using SEM, QCM, XPS, CV, and DPV techniques.
Main Results:
- * Successful development of a nanostructured SPE platform.
- * Sensitive detection of AFP in PBS with a limit-of-detection (LOD) of 0.603 pg/mL.
- * Demonstrated linearity (R^2 = 0.9247) across a wide concentration range (1 pg/mL to 1 μg/mL).
- * Exhibited excellent stability, reproducibility, and selectivity against interfering biomolecules.
Conclusions:
- * The developed SPE nanobiosensor platform offers a promising approach for liver cancer biomarker detection.
- * The integrated design with a built-in redox probe simplifies the detection process.
- * The biosensor shows potential for practical application in point-of-care healthcare monitoring devices.
