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 language | English |
|---|---|
| Pages (from-to) | 139-143 |
| Number of pages | 5 |
| Journal | Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy |
| Volume | 171 |
| DOIs | |
| Publication status | Published - Jan 15 2017 |
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
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Kharintsev, S., Alekseev, A., & Loos, J. (2017). Etchant-based design of gold tip apexes for plasmon-enhanced Raman spectromicroscopy. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 171, 139-143. https://doi.org/10.1016/j.saa.2016.07.048