Title: Remote excitation-tip-enhanced Raman scattering microscopy using silver nanowire
Authors: Fujita, Yasuhiko ×
Walke, Peter
De Feyter, Steven
Uji-I, Hiroshi #
Issue Date: 2016
Publisher: Publication Board, Japanese Journal of Applied Physics
Series Title: Japanese Journal of Applied Physics 1, Regular Papers, Short Notes & Review Papers vol:55 issue:8
Article number: 08NB03
Abstract: Tip-enhanced Raman scattering (TERS) microscopy is a promising technique for use in surface analysis, allowing both topographic and spectroscopic information to be obtained simultaneously at a scale below 10 nm. One proposed method to further improve spatial resolution is the use of propagating surface plasmons as an excitation light source (i.e., remote excitation). However, this requires a specialized tip that can only be fabricated via expensive procedures, such as electron-beam lithography. Here, we propose a new method for fabricating silver nanowire-based tips that are suitable for remote excitation-TERS, removing the need for such techniques. A silver nanowire was fixed onto a tungsten-tip using a micromanipulator, before gold nanoparticles were attached in a site-specific manner using AC-dielectrophoresis. All the processes were completed using an optical microscope in the ambient. The background intensities in TERS spectra were suppressed with remote excitation relative to the conventional excitation configuration, indicating an increase in TERS sensitivity.
ISSN: 0021-4922
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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