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Surface Plasmon-Enhanced Photoelectrochemical Sensor Based on Au Modified TiO2 Nanotubes
Wanqing Liu1, Wei Duan1, Liqun Jia1
1Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry (MOE), Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Nankai University, Tianjin 300071, China.
Nanomaterials (Basel, Switzerland)
|June 24, 2022
Summary
A new gold-modified titanium dioxide nanotube (Au/TiO2NTs) sensor detects glucose using visible light. This photoelectrochemical sensor shows high sensitivity and stability for potential non-invasive biosensor applications.
Area of Science:
- Electrochemistry
- Materials Science
- Nanotechnology
Background:
- One-dimensional nanostructures enhance charge separation efficiency.
- Gold nanoparticles exhibit strong surface plasmon resonance (SPR).
- Photoelectrochemical (PEC) sensors offer sensitive analyte detection.
Purpose of the Study:
- To develop a novel gold-modified TiO2 nanotube (Au/TiO2NTs) based glucose PEC sensor.
- To investigate the sensor's performance under visible red light (625 nm) activation.
- To evaluate the sensor's potential for non-invasive glucose monitoring.
Main Methods:
- Fabrication of Au/TiO2NTs composite material.
- Characterization of the sensor's photoelectrochemical response.
- Optimization of detection conditions for glucose measurement.
- Assessment of sensor selectivity, anti-interference, and stability.
Main Results:
- The Au/TiO2NTs sensor demonstrated high sensitivity (170.37 μA·mM⁻¹·cm⁻²) in the 1-90 μM glucose range.
- A low detection limit of 1.3 μM (S/N = 3) was achieved.
- The sensor exhibited excellent selectivity, anti-interference capabilities, and long-term stability.
Conclusions:
- The developed Au/TiO2NTs sensor is effective for practical glucose detection.
- The sensor's performance is attributed to enhanced charge separation and SPR.
- This work paves the way for non-invasive PEC biosensor development.
