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Synergistically Enhanced Ta2O5/AgNPs SERS Substrate Coupled with Deep Learning for Ultra-Sensitive Microplastic

Chenlong Zhao1, Yaoyang Wang1, Shuo Cheng1

  • 1School of Physics and Electronics, Shandong Normal University, Jinan 250014, China.

Materials (Basel, Switzerland)
|January 10, 2026
PubMed
Summary

A novel composite substrate enhances microplastic detection using Surface-Enhanced Raman Scattering (SERS). A deep-learning model accurately identifies microplastics even in noisy environments, aiding environmental monitoring.

Keywords:
SERSTa2O5deep learninghydrothermal synthesismorphology engineeringnanoplastic detection

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Area of Science:

  • Materials Science
  • Environmental Science
  • Analytical Chemistry

Background:

  • Microplastic pollution poses a significant environmental threat, necessitating sensitive and accurate detection methods.
  • Existing detection techniques often struggle with sensitivity, specificity, and performance in complex environmental matrices.
  • Surface-Enhanced Raman Scattering (SERS) offers high sensitivity but requires optimized substrates and robust data analysis.

Purpose of the Study:

  • To develop a high-performance Ta2O5/AgNPs composite SERS substrate for sensitive microplastic detection.
  • To engineer a robust deep-learning model for accurate microplastic classification in challenging conditions.
  • To provide a comprehensive solution for environmental monitoring and risk assessment of microplastic pollution.

Main Methods:

  • Fabrication of a Ta2O5/AgNPs composite SERS substrate with modulated morphology and band-gap engineering.
  • Integration of electromagnetic (EM) and chemical (CM) enhancement mechanisms for improved SERS performance.
  • Development of a multi-scale deep-learning model incorporating wavelet transform, CNN, and Transformers for spectral analysis.
  • Evaluation of microplastic capture efficiency and SERS detection limits for various polymers (PS, PET, PMMA).

Main Results:

  • Achieved an ultra-low detection limit of 10^-13 M for Rhodamine 6G (R6G) with excellent linearity.
  • Demonstrated superior capture capability for microplastics (PS, PET, PMMA) using a 3D 'pseudo-Neuston' network structure.
  • The deep-learning model achieved 98.7% classification accuracy for microplastics under high-noise conditions, outperforming traditional methods.

Conclusions:

  • The engineered Ta2O5/AgNPs composite SERS substrate offers high sensitivity and capture efficiency for microplastics.
  • The proposed deep-learning model provides robust and accurate microplastic identification in complex, noisy environments.
  • This integrated approach presents a significant advancement for environmental monitoring and microplastic pollution risk assessment.