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Related Experiment Video

Updated: Oct 21, 2025

Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
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Highly stable silver-platinum core-shell nanowires for H2O2 detection.

Serkan Koylan1, Sensu Tunca, Gokhan Polat

  • 1Department of Metallurgical and Materials Engineering, Middle East Technical University (METU), 06800, Ankara, Turkey. unalan@metu.edu.tr.

Nanoscale
|September 3, 2021
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Summary

Platinum shells protect silver nanowires from degradation, enhancing their stability and performance in electrochemical and sensing applications. This simple coating strategy improves chemical and environmental resistance, enabling wider use of silver nanowire networks.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Silver nanowire (Ag NW) networks offer promising alternatives to transparent conducting oxides due to their flexibility and cost-effectiveness.
  • Challenges remain in Ag NW utilization, primarily due to performance degradation from oxidation and sulfidation.

Purpose of the Study:

  • To develop a solution-based method for enhancing the stability of Ag NWs.
  • To investigate the impact of a platinum (Pt) shell on the chemical, environmental, and electrochemical properties of Ag NWs.

Main Methods:

  • A thin platinum (Pt) shell (15 nm) was deposited onto Ag NWs using a solution-based approach.
  • Core-shell Ag NW networks were subjected to various humidity and temperature conditions to assess environmental and thermal stability.
  • Electrochemical stability was evaluated, and the performance of Ag-Pt core-shell NWs in hydrogen peroxide detection was tested.

Main Results:

  • Pt-coated Ag NWs exhibited significantly improved environmental and thermal stability compared to bare Ag NWs.
  • The electrochemical potential window for Ag NW networks was broadened from 0-0.6 V to 0-1 V (vs. Ag/AgCl) after Pt deposition.
  • Ag-Pt core-shell NWs demonstrated high sensitivity (0.04 μA μM⁻¹) for hydrogen peroxide detection with a low detection limit (10.95 μM).

Conclusions:

  • The Pt shell effectively enhances the chemical, environmental, and electrochemical stability of Ag NW networks.
  • This simple and effective strategy paves the way for the large-scale application of Ag NWs in electrochemical and sensing devices.
  • The improved stability and sensing capabilities of Ag-Pt core-shell NWs highlight their potential for advanced technological applications.