Etchant-based design of gold tip apexes for plasmon-enhanced Raman spectromicroscopy

Sergey Kharintsev, Alexander Alekseev, Joachim Loos

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In this paper, we gain insight into the design and optimization of plasmonic (metallic) tips prepared with dc-pulsed voltage electrochemical etching gold wires, provided that, a duty cycle is self-tuned. Physically, it means that etching electrolyte attacks the gold wire equally for all pulse lengths, regardless of its surface shape. Etchant effect on the reproducibility of a curvature radius of the tip apex is demonstrated. It means that the gold conical tips can be designed chemically with a choice of proper etchant electrolyte. It is suggested to use a microtomed binary polymer blend consisting of polyamide and low density polyethylene, as a calibration grating, for optimizing and standardizing tip-enhanced Raman scattering performance.

Original languageEnglish
Pages (from-to)139-143
Number of pages5
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume171
DOIs
Publication statusPublished - Jan 15 2017

Fingerprint

etchants
Gold
apexes
gold
Electrolytes
Wire
Electrochemical etching
Nylons
etching
Low density polyethylenes
electrolytes
Polyethylene
wire
Polymer blends
Polyamides
Raman scattering
Etching
polymer blends
Calibration
attack

Keywords

  • Calibration grating
  • Electrochemical etching
  • Enhanced optical spectroscopy
  • Etchant effect
  • Gold tip
  • Optical antenna
  • Optical near-field
  • Polyethelene
  • Polyimide
  • Surface plasmon
  • Tip-enhanced Raman scattering

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

Cite this

Etchant-based design of gold tip apexes for plasmon-enhanced Raman spectromicroscopy. / Kharintsev, Sergey; Alekseev, Alexander; Loos, Joachim.

In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, Vol. 171, 15.01.2017, p. 139-143.

Research output: Contribution to journalArticle

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