Degradation of silver near-field optical probes and its electrochemical reversal

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Author(s) Opilik, Lothar, Dogan, Üzeyir, Szczerbiński, Jacek, Zenobi, Renato
Publication Type Journal Items, Publication Status: Published
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Title Degradation of silver near-field optical probes and its electrochemical reversal
Author(s) Opilik, Lothar
Dogan, Üzeyir
Szczerbiński, Jacek
Zenobi, Renato
Description 5 p.
Journal or Series Title Applied Physics Letters
Volume Number 107
Issue Number 9
Start Page 091109
ISSN 0003-6951
Publisher American Institute of Physics
Publication Place Melville, NY
Publication Date 2015
Abstract Deterioration of the outstanding optical properties of elemental silver due to atmospheric corrosion compromises its use in the field of plasmonics. Therefore, more chemically inert, but more lossy, metals (e.g., gold) are often used as a compromise. Silver tips for near-field optical microscopy are only utilized by specialized laboratories with in-house tip production facilities. This article presents a time-dependent study of the effect of atmospheric corrosion on the electromagnetic enhancement of solid silver tips. It was found that chemical degradation renders them unusable for tip-enhanced Raman spectroscopy (TERS) within the first two days after production. Furthermore, we present a simple electrochemical method for recovering the enhancing effect of corroded silver tips, as well as for storing freshly prepared probes, for example, for easy shipment. The present work greatly simplifies the experimental aspects of near-field optical microscopy, which should make near-field optical techniques, and, in particular, TERS, more accessible to the scientific community.
DOI 10.1063/1.4929880
Additional Notes Received 5 June 2015, Accepted 19 August 2015, Published online 1 September 2015
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03430
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NEBIS System Number 000038985
Source Database ID WOS-000360926200009
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  author = "Opilik, Lothar and Dogan, {\"{U}}zeyir and Szczerbi{\'{n}}ski, Jacek and Zenobi, Renato",
  title = "{D}egradation of silver near-field optical probes and its electrochemical reversal",
  journal = "Applied Physics Letters",
  year = 2015,
  volume = "107",
  number = "9",
  pages = "091109--",

E-Citations record created: Mon, 05 Oct 2015, 10:31:14 CET