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Magnetoelectrically Enhanced Molecular Recognition on Plasmonic Surfaces.

Nandan Murali1, Aastha2,3,4, Shashank Bhushan Das1

  • 1Department of Electrical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India.

Small (Weinheim an Der Bergstrasse, Germany)
|March 27, 2026
PubMed
Summary

We developed a novel magnetoelectrically induced surface-enhanced Raman signal amplification (MIERS) method. This technique enhances Raman signals for ultrasensitive detection of biomolecules and Raman markers.

Keywords:
DNA detectionMIERSSERSmagnetoelectric nanostructureultrasonic spray pyrolysis

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Area of Science:

  • Plasmonics
  • Nanotechnology
  • Spectroscopy

Background:

  • Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical technique.
  • Current SERS methods face limitations in sensitivity and control.
  • Novel amplification strategies are needed for advanced applications.

Purpose of the Study:

  • To introduce a new method for SERS signal amplification using magnetoelectric effects.
  • To demonstrate ultrasensitive detection of analytes via enhanced SERS.
  • To explore the potential of magnetoelectric actuation for molecular recognition.

Main Methods:

  • Fabrication of a plasmonic nanocomposite with magnetostrictive nanorods in piezoelectric nanospheres decorated with silver nanoparticles (AgNPs).
  • Utilizing magnetoelectrically induced charge carrier generation for SERS enhancement.
  • In-situ atomic force microscopy to characterize the magnetoelectric nanostructure.

Main Results:

  • Achieved highly localized surface charge carrier generation with significant magnetoelectric voltage.
  • Demonstrated ultrasensitive detection of Raman markers and biomolecules down to nanomolar concentrations.
  • Observed enhanced SERS response attributed to increased plasma frequency and charge transfer.

Conclusions:

  • The magnetoelectrically induced surface-enhanced Raman signal amplification (MIERS) method offers a novel approach to boost SERS signals.
  • MIERS provides a versatile platform for sensitive and specific molecular detection in analytical and biomedical fields.
  • This technique shows promise for future developments in precise chemical and biological sensing.