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Multi-Functional Applications of H-Glass Embedded with Stable Plasmonic Gold Nanoislands.

Jagannath Gangareddy1, Pratyasha Rudra1,2, Manohar Chirumamilla3,4

  • 1CSIR-Central Glass and Ceramic Research Institute, 196 Raja S C Mullick Road, Kolkata, 700 032, India.

Small (Weinheim an Der Bergstrasse, Germany)
|September 6, 2023
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Summary

A novel H-glass substrate stabilizes plasmonic gold nanoislands (GNIs), enabling multifunctional applications. This breakthrough offers enhanced stability for metal nanoparticles (MNPs) in gas sensing, spectroscopy, and nonlinear optics.

Keywords:
NO2 gas sensorsglassesgold nanoislandssaturable absorberstability of gold nano-islandssurface-enhanced Raman spectroscopy substrate

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Metal nanoparticles (MNPs) exhibit unique properties but suffer from poor substrate adhesion and stability.
  • Developing stable MNPs on diverse substrates is crucial for advanced applications.

Purpose of the Study:

  • To develop a novel H-glass substrate for stabilizing plasmonic gold nanoislands (GNIs).
  • To demonstrate the multifunctional applications of GNIs on H-glass, including sensing, spectroscopy, and nonlinear optics.

Main Methods:

  • Synthesis of GNIs on H-glass via thermal dewetting.
  • Characterization of GNI-embedded H-glass for gas sensing (NO2).
  • Evaluation as substrates for surface-enhanced Raman spectroscopy (SERS).
  • Assessment of nonlinear optical properties.

Main Results:

  • H-glass effectively stabilizes GNIs, overcoming adhesion challenges.
  • Demonstrated room-temperature chemiresistive gas sensing with a 70% response for NO2.
  • Achieved high enhancement factors (4.8 × 10^6 for Nile blue, 6.1 × 10^5 for picric acid) in SERS.
  • Exhibited nonlinear optical saturable absorber performance comparable to existing materials.

Conclusions:

  • H-glass provides a facile and robust strategy for developing stable, multifunctional metal nanoisland-based materials.
  • The developed material shows significant potential for applications in chemical sensing, explosive detection, and optical devices.