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Crystal Field Theory
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Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
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Gold surface plasmon crystal structure based-on polystyrene template for biosensor application.

Min-Zhuo Cheng1, Jing Zhang2, Dequan Bao1

  • 1Ixing Biotechnology Co. Ltd., Chengdu, P. R. China.

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|May 23, 2018
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Summary
This summary is machine-generated.

We created ordered gold and silver nanostructures using etched polystyrene microsphere templates. Oxygen plasma etching precisely controlled spacing, influencing the final gold nanostructure morphology.

Keywords:
Metal nanostructuresOxygen plasmaPolystyrene microspheresSelf-assembly

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • Ordered arrays of metallic nanoparticles are crucial for plasmonic and photonic applications.
  • Controlling nanoparticle spacing is key to tuning optical and electronic properties.
  • Polystyrene (PS) microspheres offer a versatile template for nanostructure fabrication.

Purpose of the Study:

  • To develop a method for fabricating ordered nano-triangular gold and silver nano-pyramid arrays.
  • To investigate the effect of oxygen plasma etching on polystyrene microsphere templates.
  • To analyze the influence of template spacing on the morphology of deposited gold nanostructures.

Main Methods:

  • Ordered polystyrene (PS) microsphere arrays were assembled using the drop-coating method.
  • Oxygen plasma etching was employed to precisely adjust the spacing between PS microspheres.
  • Ion beam sputtering was used to deposit gold (Au) and silver (Ag) for nanostructure formation.
  • Scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-Vis spectrophotometry were used for characterization.

Main Results:

  • Oxygen plasma etching effectively controlled the inter-microsphere spacing.
  • The etching time significantly influenced the morphology of the resulting gold nanostructures.
  • Ordered nano-triangular gold and silver nano-pyramid arrays were successfully fabricated.
  • Characterization confirmed the formation and properties of the metallic nanostructures.

Conclusions:

  • The presented method allows for controlled fabrication of metallic nanostructures with tunable spacing.
  • Oxygen plasma etching is a critical parameter for tailoring nanostructure morphology.
  • This technique holds promise for applications in plasmonics, sensing, and optical devices.