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Polysilicon wire glucose sensor highly immune to interference.

You-Lin Wu1, Po-Yen Hsu, Jing-Jenn Lin

  • 1Department of Electrical Engineering, National Chi Nan University, Puli, Nantou, Taiwan, ROC.

Biosensors & Bioelectronics
|October 30, 2010
PubMed
Summary
This summary is machine-generated.

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This novel glucose sensor using polysilicon wire (PSW) with a specialized surface modification demonstrates remarkable resistance to common interfering substances. The enhanced PSW sensor effectively minimizes interference, ensuring accurate glucose detection even at high interference-to-glucose ratios.

Area of Science:

  • Materials Science
  • Biosensors
  • Nanotechnology

Background:

  • Accurate glucose monitoring is crucial for diabetes management.
  • Existing glucose sensors often suffer from interference from other biological molecules.
  • Developing interference-free glucose sensors is a significant challenge in diagnostics.

Purpose of the Study:

  • To investigate the interference elimination ability of a polysilicon wire (PSW) glucose sensor.
  • To evaluate the effectiveness of a novel surface modification (γ-APTES+NPs+UV) on interference reduction.
  • To characterize the performance of the modified PSW glucose sensor.

Main Methods:

  • Fabrication of a polysilicon wire (PSW) glucose sensor.
  • Surface modification of the PSW using 3-aminopropyltriethoxysilane, polydimethylsiloxane-treated hydrophobic fumed silica nanoparticles, and UV illumination (γ-APTES+NPs+UV).

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  • Testing the sensor's response in the presence of common interferents: ascorbic acid (AA), uric acid (UA), acetaminophen (AP), L-cysteine (Lys), and citric acid (CA).

    • Main Results:

    • The modified PSW sensor exhibited low interference disturbance at interference-to-glucose concentration ratios up to 600:1.
    • The sensor demonstrated significantly lower leakage current (three orders of magnitude) compared to a sensor with γ-APTES modification only.
    • The dry-type sensor design and the low-leakage γ-APTES+NPs membrane contributed to excellent interference immunity.

    Conclusions:

    • The γ-APTES+NPs+UV modified PSW glucose sensor offers outstanding interference immunity.
    • The sensor exhibits a wide linear detection range, ultra-high sensitivity, and an ultra-low detection limit.
    • The reusable sensor maintains performance over a thousand cycles without significant degradation, indicating its potential for practical applications.