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Related Experiment Video

Updated: Jul 21, 2025

Author Spotlight: Development and Application of SERS Flexible Substrates Using Synthesized AgNPs
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Magnetically-assembled multifunctional magnetic-plasmonic SERS substrate for low-concentration analyte detection.

Shilpa R Amonkar1, Sudhir Cherukulappurath1

  • 1School of Physical and Applied Sciences, Goa University, Taleigao Plateau, Goa 403206, India.

Nanotechnology
|July 27, 2023
PubMed
Summary

We developed novel magnetic-plasmonic nanoparticles (Fe3O4@GO@Ag) for enhanced sensing. These particles self-assemble magnetically, enabling sensitive detection of analytes via surface-enhanced Raman scattering (SERS).

Keywords:
SERSmagnetic assemblymultifunctional nanoparticlesplasmonics

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Multifunctional nanoparticles with magnetic and optical properties are crucial for advanced applications.
  • Magnetic properties enable non-contact manipulation, while optical properties are key for sensing.

Purpose of the Study:

  • To synthesize and assemble inter-layered magnetic-plasmonic nanoparticles with graphene oxide (GO) spacers (Fe3O4@GO@Ag).
  • To explore their potential for sensitive analyte detection using surface-enhanced Raman scattering (SERS).

Main Methods:

  • Simple chemical synthesis methods were used to create Fe3O4@GO@Ag nanoparticles (average size 225 nm).
  • Characterization involved techniques like XRD, FT-IR, Raman scattering, SEM, and TEM.
  • Magnetic-field-induced large-scale assembly into chain-like structures was achieved.

Main Results:

  • The synthesized Fe3O4@GO@Ag nanoparticles exhibited combined magnetic and plasmonic properties.
  • Magnetically assembled particle chains served as effective substrates for SERS.
  • Demonstrated highly sensitive detection of low concentrations of 4-mercaptopyridine using SERS.

Conclusions:

  • Fe3O4@GO@Ag nanoparticles offer a versatile platform for various applications.
  • Their magnetic assembly facilitates sensitive chemical detection.
  • Potential applications include sensing, photocatalysis, optoelectronics, and photothermal effects.