TY - JOUR
T1 - Etchant-based design of gold tip apexes for plasmon-enhanced Raman spectromicroscopy
AU - Kharintsev, Sergey
AU - Alekseev, Alexander
AU - Loos, Joachim
N1 - Funding Information:
This work was financially supported by the Russian Foundation for Basic Research (No. 15-42-02339 ). This work was done using equipment of Federal Center of Shared Equipment of Kazan Federal University. Work of A.A. and partly S.Kh. was supported by Ministry of Education and Science of Kazakhstan program "NU-LBNL" 0115РК03029 .
PY - 2017/1/15
Y1 - 2017/1/15
N2 - 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.
AB - 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.
KW - Calibration grating
KW - Electrochemical etching
KW - Enhanced optical spectroscopy
KW - Etchant effect
KW - Gold tip
KW - Optical antenna
KW - Optical near-field
KW - Polyethelene
KW - Polyimide
KW - Surface plasmon
KW - Tip-enhanced Raman scattering
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U2 - 10.1016/j.saa.2016.07.048
DO - 10.1016/j.saa.2016.07.048
M3 - Article
AN - SCOPUS:84982719104
VL - 171
SP - 139
EP - 143
JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
SN - 1386-1425
ER -