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AuNPs-Decorated Tungsten Disulfide Nanostructured Hybrid System as SERS for Biomolecule Sensing

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Abstract:

The rapid progress of nanotechnology has created new avenues for the development of innovation in medical and biological devices. Transition metal dichalcogenides (TMDs) nanostructures such as tungsten disulfide nanodiscs (WS2-NDs) decorated with metallic nanoparticles, provide promising novel materials for surface Enhanced Raman Spectroscopy (SERS). This work focuses on the design and fabrication of a new SERS substrate based on AuNPs/WS2-NDs hybrid system, which exhibits a strong localized surface plasmonic resonance (LSPR) and achieves up to an order of magnitude enhancement in Raman spectra intensity compared to WS2-NDs only. This superior performance is attributed to the improved electromagnetic mechanism (EM) on the metallic gold nanoparticles and on the nonmetallic TMDs nanostructures. The chemical mechanism (CM), which facilitates charge transfer between analyte molecules and WS2-NDs, allows for further improvement of Raman spectra on SERS on tungsten disulfide nanodiscs.

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Periodical:

Solid State Phenomena (Volume 392)

Pages:

91-96

DOI:

https://doi.org/10.4028/p-IsAuH3

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Online since:

April 2026

Authors:

Samar Ghopry*

Keywords:

AuNPs, Biosensing, Surface Enhanced Raman Scattering, TMD Nanostructures

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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