Chemical stability of plasmon-active silver tips for tip-enhanced Raman spectroscopy

• Autorzy: Jana Kalbacova , Raul D. Rodriguez , Vivek Desale , Maximilian Schneider , Ihsan Amin , Rainer Jordan , Dietrich R.T. Zahn
• Języki publikacji: EN

Abstrakty

EN

Silver nanostructures are used in tip- and surface-enhanced Raman spectroscopy due to their high electric field enhancement over almost the entire visible spectral range. However, the low chemical stability of silver, compared to other noble metals, promotes silver sulfide and sulfate formation which decreases its plasmonic activity. This is why silver tips are usually prepared on the same day of the experiments or are disregarded in favour of gold that is chemically more stable. Since silver degradation cannot be avoided, we hypothesized that a protection layer may be able to minimize or control degradation. In this contribution, we report the successful preparation of 4-biphenylthiol and 4’-nitro-4-biphenylthiol self-assembled monolayers on silver tips in order to protect them against tarnishing and to investigate the effect on the life-time of the plasmonic activity. The electrochemically etched wire surface was probed via Raman spectroscopy and scanning electron microscopy. The best long term stability and resistance against corrosion was shown by a monolayer of 4-biphenylthiol formed from dimethylformamide which did not display any degradation of the metallic tip during the observed period. Here, we demonstrate an easy and straightforward approach towards increasing the chemical stability of silver TERS-active probes.

Słowa kluczowe

EN

Silver probes; SAM; Raman spectroscopy; scanning electron microscopy; tip-enhanced Ramanspectroscopy; apertureless SNOM probes

• Czasopismo: Nanospectroscopy
• Rocznik: 2014
• Tom: 1
• Numer: 1

Daty

otrzymano

2014-06-23

zaakceptowano

2014-11-03

online

2015-01-09

Twórcy

autor

Jana Kalbacova

• Semiconductor
  Physics, Technische Universität Chemnitz, Chemnitz, 09107, Germany
• Center for Advancing Electronics Dresden (cfaed),
  Technische Universität Chemnitz, Chemnitz, 09107, Germany

autor

Raul D. Rodriguez

• Semiconductor
  Physics, Technische Universität Chemnitz, Chemnitz, 09107, Germany
• Center for Advancing Electronics Dresden (cfaed),
  Technische Universität Chemnitz, Chemnitz, 09107, Germany

autor

Vivek Desale

• Semiconductor
  Physics, Technische Universität Chemnitz, Chemnitz, 09107, Germany

autor

Maximilian Schneider

• Department Chemie,
  Professur für Makromolekulare Chemie, Technische Universität
  Dresden, Dresden, 01069, Germany

autor

Ihsan Amin

• Department Chemie,
  Professur für Makromolekulare Chemie, Technische Universität
  Dresden, Dresden, 01069, Germany
• Center for Advancing Electronics Dresden (cfaed),
  Technische Universität Chemnitz, Chemnitz, 09107, Germany

autor

Rainer Jordan

• Department Chemie,
  Professur für Makromolekulare Chemie, Technische Universität
  Dresden, Dresden, 01069, Germany
• Center for Advancing Electronics Dresden (cfaed),
  Technische Universität Chemnitz, Chemnitz, 09107, Germany

autor

Dietrich R.T. Zahn

• Semiconductor
  Physics, Technische Universität Chemnitz, Chemnitz, 09107, Germany
• Center for Advancing Electronics Dresden (cfaed),
  Technische Universität Chemnitz, Chemnitz, 09107, Germany

Bibliografia

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• [12] Yee, C.K., et al., Novel One-Phase Synthesis of Thiol-FunctionalizedGold, Palladium, and Iridium Nanoparticles UsingSuperhydride. Langmuir, 1999. 15(10): p. 3486-3491.[Crossref]
• [13] Kudelski, A., Some aspects of SERS temporal fluctuations:analysis of the most intense spectra of hydrogenatedamorphous carbon deposited on silver. Journal of RamanSpectroscopy, 2007. 38(11): p. 1494-1499.[WoS][Crossref]
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Identyfikatory

DOI

10.2478/nansp-2014-0002