Related Experiment Video
Updated: Mar 29, 2026
Fully Automated Centrifugal Microfluidic Device for Ultrasensitive Protein Detection from Whole Blood
Published on: April 16, 2016
Self-powered PEC/EC dual-mode sensing platform for sensitive TNF-α detection based on multifunctional mesoporous
Jing Feng1, Huanhuan He1, Luna Guo
1Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China. shenlan.2003@163.com.
A novel self-powered biosensor platform enables sensitive dual-mode detection of tumor necrosis factor-alpha (TNF-α), crucial for early cancer diagnosis. This photoelectrochemical-electrochemical system offers high accuracy and reliability in detecting TNF-α in human serum.
Area of Science:
- Biomedical Engineering
- Analytical Chemistry
- Materials Science
Background:
- Tumor necrosis factor-alpha (TNF-α) is a key cytokine in inflammation-associated carcinogenesis and is overexpressed in early-stage tumors.
- Sensitive detection of TNF-α is essential for early disease diagnosis and monitoring.
- Existing detection methods may lack the sensitivity or dual-mode capabilities required for comprehensive analysis.
Purpose of the Study:
- To construct a self-powered platform for highly sensitive photoelectrochemical-electrochemical (PEC-EC) dual-mode detection of TNF-α.
- To develop a novel bifunctional material for enhanced signal amplification in TNF-α detection.
- To validate the platform's performance in quantifying TNF-α in biological samples like human serum.
Main Methods:
- Fabrication of a self-powered PEC-EC platform using a MgIn₂S₄@In₂O₃ photoanode and Cl/PPECu photocathode.
- Integration of MnO₂-coated mesoporous silica@ferrocene (MFMSN) as a bifunctional material for dual-mode detection.
- Utilizing MFMSN's steric hindrance and ferrocene-catalyzed ascorbic acid oxidation for signal generation and amplification in the presence of TNF-α.
Main Results:
- The self-powered platform achieved ultra-low detection limits for TNF-α: 0.140 fg mL⁻¹ (PEC mode) and 2.65 fg mL⁻¹ (EC mode).
- Demonstrated a wide detection range from 5.00 fg mL⁻¹ to 5.00 ng mL⁻¹ (PEC) and 10.0 fg mL⁻¹ to 10.0 ng mL⁻¹ (EC).
- Successfully quantified TNF-α in human serum samples, indicating practical applicability and reliability.
Conclusions:
- The developed self-powered PEC-EC dual-mode biosensor offers a highly sensitive, reliable, and accurate method for TNF-α detection.
- This platform holds significant potential for early diagnosis and monitoring of diseases associated with TNF-α overexpression.
- The innovative use of bifunctional materials and dual-mode detection strategy advances biosensing technology.
