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Synthesis and Characterization of Silver-Gold Bimetallic Nanoparticles for Random Lasing.

Wan Zakiah Wan Ismail1, Judith M Dawes2

  • 1Advanced Devices and System, Faculty of Engineering and Built Environment, Universiti Sains Islam Malaysia, Nilai 71800, Negeri Sembilan, Malaysia.

Nanomaterials (Basel, Switzerland)
|February 26, 2022
PubMed
Summary

Rough silver-gold bimetallic nanoparticles were developed for enhanced random lasing. These nanoparticles demonstrate spectral narrowing and a lower lasing threshold compared to silver nanoparticles, paving the way for advanced random laser development.

Keywords:
and random lasersbimetalliclocalized surface plasmon effectsnanomaterialsurface roughness

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Optics

Background:

  • Random lasing offers a unique approach to laser generation.
  • Developing efficient materials for random lasers is crucial for advancing optical technologies.

Purpose of the Study:

  • To synthesize rough silver-gold bimetallic nanoparticles for random lasing applications.
  • To investigate the performance of these nanoparticles in a weakly scattering regime.

Main Methods:

  • Silver nanoparticles synthesized via citrate-reduction.
  • Gold (III) chloride trihydrate added for bimetallic formation through galvanic replacement.
  • Characterization using spectrometry to observe nanogaps and extinction.

Main Results:

  • Bimetallic nanoparticles exhibited enhanced random lasing properties compared to silver nanoparticles.
  • Observed spectral narrowing and a reduced lasing threshold with bimetallic nanoparticles.
  • Localized surface plasmon effects and rough surface morphology contribute to increased optical gain.

Conclusions:

  • Rough silver-gold bimetallic nanoparticles are effective for random dye lasers.
  • The enhanced performance is attributed to localized surface plasmon resonance and surface roughness.
  • These nanoparticles show significant potential for the development of novel random lasers.