Surface modification of Au and Ag plasmonic thin films via diazonium chemistry

Evaluation of structure and properties

Oleksiy Guselnikova, Pavel Postnikov, Roman Elashnikov, Marina Trusova, Yevgeniya Kalachyova, Milan Libansky, Jiri Barek, Zdenka Kolska, Vaclav Švorčík, Oleksiy Lyutakov

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Plasmon-active noble metals nanostructures based on Ag and Au thin films become widely applied in the field of plasmonics and related sensing technologies. For improvement of the metal interaction with different media, metals surface can be functionalized in order to increase/decrease hydrophilicity, lipophilicity or introduce/change the surface charge. In this paper, the surface functionalization of plasmon-active Au and Ag films using arenediazonium tosylates was described. The surface functionalization was performed in the aqueous medium by the spontaneous and electrically induced mechanisms. Functionalized surfaces were characterized by the Raman and UV–vis spectroscopies, AFM nanomechanical mapping, SEM (EDX), XPS, CVA, zeta- potential, and water contact angle measurement techniques. It was founded that the key difference between reactivity of gold and silver films is distributional behavior of grafted organic functional groups: silver has higher tendency to form clustered, island-like structure while gold is covered more homogeneously. Spontaneous modification forms approximately monomolecular thick films of organic compounds and can be used in the field of SPR or SERS sensors. Electrochemically induced activation produces thick polyphenylene layer on the metal surface and can find application in the field of tunable plasmonic devices or plasmon-based lasers.

Original languageEnglish
Pages (from-to)274-285
Number of pages12
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume516
DOIs
Publication statusPublished - 5 Mar 2017

Fingerprint

Surface treatment
chemistry
Thin films
evaluation
thin films
Metals
metal surfaces
Silver
Gold
silver
gold
noble metals
organic compounds
thick films
Hydrophilicity
Zeta potential
Surface charge
Angle measurement
Precious metals
tendencies

Keywords

  • Diazonium chemistry
  • Plasmonic thin films
  • Surface modification
  • Surface properties

ASJC Scopus subject areas

  • Colloid and Surface Chemistry

Cite this

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title = "Surface modification of Au and Ag plasmonic thin films via diazonium chemistry: Evaluation of structure and properties",
abstract = "Plasmon-active noble metals nanostructures based on Ag and Au thin films become widely applied in the field of plasmonics and related sensing technologies. For improvement of the metal interaction with different media, metals surface can be functionalized in order to increase/decrease hydrophilicity, lipophilicity or introduce/change the surface charge. In this paper, the surface functionalization of plasmon-active Au and Ag films using arenediazonium tosylates was described. The surface functionalization was performed in the aqueous medium by the spontaneous and electrically induced mechanisms. Functionalized surfaces were characterized by the Raman and UV–vis spectroscopies, AFM nanomechanical mapping, SEM (EDX), XPS, CVA, zeta- potential, and water contact angle measurement techniques. It was founded that the key difference between reactivity of gold and silver films is distributional behavior of grafted organic functional groups: silver has higher tendency to form clustered, island-like structure while gold is covered more homogeneously. Spontaneous modification forms approximately monomolecular thick films of organic compounds and can be used in the field of SPR or SERS sensors. Electrochemically induced activation produces thick polyphenylene layer on the metal surface and can find application in the field of tunable plasmonic devices or plasmon-based lasers.",
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author = "Oleksiy Guselnikova and Pavel Postnikov and Roman Elashnikov and Marina Trusova and Yevgeniya Kalachyova and Milan Libansky and Jiri Barek and Zdenka Kolska and Vaclav Švorč{\'i}k and Oleksiy Lyutakov",
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T1 - Surface modification of Au and Ag plasmonic thin films via diazonium chemistry

T2 - Evaluation of structure and properties

AU - Guselnikova, Oleksiy

AU - Postnikov, Pavel

AU - Elashnikov, Roman

AU - Trusova, Marina

AU - Kalachyova, Yevgeniya

AU - Libansky, Milan

AU - Barek, Jiri

AU - Kolska, Zdenka

AU - Švorčík, Vaclav

AU - Lyutakov, Oleksiy

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