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Solid-to-Hollow Conversion of Silver Nanocrystals by Surface-Protected Etching.

Kai Liu1, Hongpo Liu1, Qikui Fan1

  • 1Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, P. R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|September 28, 2018
PubMed
Summary

Researchers developed a new method to create hollow silver nanocrystals efficiently. This surface-protected etching strategy converts solid silver nanocrystals into hollow nanospheres and nanotubes with unique optical properties for plasmonic and electronic applications.

Keywords:
etchinghollow nanospheresnanotubessilversurface plasmon resonance

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Plasmonics

Background:

  • Hollow silver nanocrystals exhibit unique plasmonic properties.
  • Existing synthesis strategies lack efficiency and controllability.
  • Solid silver nanocrystals are readily available from conventional methods.

Purpose of the Study:

  • To develop a robust and controllable strategy for synthesizing hollow silver nanocrystals.
  • To convert readily available solid silver nanocrystals into their hollow counterparts.
  • To explore the plasmonic and electronic applications of the synthesized hollow silver nanocrystals.

Main Methods:

  • A novel surface-protected etching strategy was employed.
  • Solid silver nanocrystals were modified with a small amount of platinum (Pt) on their surface.
  • Controlled etching of silver (Ag) from the inner part of the nanocrystals was performed, preserving morphology.

Main Results:

  • Hollow silver nanospheres and nanotubes were successfully synthesized.
  • The platinum surface modification enhanced silver surface stability and enabled controlled etching.
  • Hollow silver nanotubes demonstrated enhanced optical transmittance in flexible electrodes compared to nanowires.

Conclusions:

  • The developed surface-protected etching strategy provides an efficient and controllable method for producing hollow silver nanocrystals.
  • These novel hollow silver nanocrystals exhibit distinct optical properties.
  • The findings suggest significant potential for hollow silver nanocrystals in plasmonic and electronic applications.