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Related Experiment Video

Updated: Sep 11, 2025

Author Spotlight: Development and Application of SERS Flexible Substrates Using Synthesized AgNPs
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Piezoelectric-driven self-powered sensor with tunable plasmonic hotspots for enhanced SERS performance.

Ke Chen1, Mei Sun1, Hanmei Hu1

  • 1School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, PR China; Anhui Province Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei 230601, PR China.

Journal of Colloid and Interface Science
|August 12, 2025
PubMed
Summary

This study introduces a self-powered sensor for enhanced Raman spectroscopy (E-SERS) using piezoelectric materials. The novel device achieves highly sensitive detection of contaminants like thiram, malachite green, and sulfamonomethoxine without external power.

Keywords:
Malachite greenPiezoelectricSERSSelf-poweredSulfamonomethoxine

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Area of Science:

  • Materials Science
  • Spectroscopy
  • Sensor Technology

Background:

  • Electrically Modulated Surface-enhanced Raman spectroscopy (E-SERS) enhances signal intensity but often requires external power sources.
  • Developing portable, self-powered sensors is crucial for real-world sample detection.

Purpose of the Study:

  • To develop a self-powered E-SERS sensor for enhanced Raman signal detection.
  • To utilize piezoelectric materials for energy conversion and signal amplification.

Main Methods:

  • A composite material integrating lead zirconate titanate (PZT) and dopamine-functionalized reduced graphene oxide (rGO@PDA) within a polyvinylidene fluoride-trifluoroethylene (PVDF-TrFE) matrix was fabricated.
  • Silver nanoparticles (Ag NPs) were incorporated to leverage localized surface plasmon resonance (LSPR).
  • External pressure was applied to the sensor to generate electrical signals and enhance Raman detection.

Main Results:

  • The self-powered sensor generated voltage and current upon mechanical stimulation.
  • Highly tunable signal enhancement was achieved through the combined effects of piezoelectricity and LSPR.
  • Ultra-high sensitivity was demonstrated, with a low limit of detection (LOD) of 10-12 M for thiram and low variation (8.5%).
  • The sensor successfully detected fungicide (malachite green) and antibiotic (sulfamonomethoxine) residues at 10-7 M levels in food samples.

Conclusions:

  • The developed PVDF-TrFE/PZT-rGO@PDA/Ag composite serves as an effective self-powered E-SERS substrate.
  • The sensor shows significant potential for sensitive and portable detection of various analytes, particularly in food safety applications.