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Etchant-based design of gold tip apexes for plasmon-enhanced Raman spectromicroscopy
Authors
Alekseev A.
Kharintsev S.
Loos J.
Publication date
1 January 2017
Publisher
Abstract
© 2016 Elsevier B.V.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
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Last time updated on 07/05/2019