Surface plasmonic spectroscopy revealing the oxidation dynamics of copper nanowires embedded in polycarbonate ion-track templates

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

12 Scopus Citations
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  • Jinglai Duan
  • Jie Liu
  • Yongliang Zhang
  • Christina Trautmann
  • Dang Yuan Lei


Original languageEnglish
Pages (from-to)3956-3962
Journal / PublicationJournal of Materials Chemistry C
Issue number18
Online published23 Dec 2015
Publication statusPublished - 14 May 2016
Externally publishedYes


Chemical stability of metal nanowires is a great concern for many practical applications. Metal nanowires deposited in the pores of various templates have been considered oxidization-resistant because the templates provide natural protection. Here we present the first ever attempt to investigate the oxidation behavior of copper nanowires supported in a template matrix using a surface-plasmon-based optical spectroscopy method combined with high-resolution transmission electron microscopy (TEM). Although the nanowires are protected by being embedded in the polymer template matrix, unexpected oxidation is clearly observed in TEM imaging, which unambiguously reveals the possible underlying oxidation mechanism responsible for the oxidation passivation. By measuring the optical properties with localized surface plasmon resonance spectroscopy, the oxidation behavior of the copper nanowires is studied as a function of storage time in both air and vacuum and thus uncovers the oxidation dynamics of copper. Finally, we demonstrate that the oxidation can be entirely prevented by sealing the open ends of the wires, which is confirmed by monitoring the electrical resistance of single nanowires. Our results have significant importance in understanding the oxidation behavior of metal nanostructures in general and also provide useful guidelines to estimate their electrical functionality in optoelectronic devices.

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