DC-pulsed voltage electrochemical method based on duty cycle self-control for producing TERS gold tips

16th International Youth Scientific School 'Actual Problems of Magnetic Resonance and its Applications'

Vasilchenko, V.E.^1 ; Kharintsev, S.S.^1 ; Salakhov, M.Kh.^1

Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kremlevskaya 16, Kazan, 420008, Russia^1

关键词: ELectrochemical methods;    Etching rate;    Higher yield;    Pulsed voltages;    Raman signal;    Single-walled carbon;    Tip-enhanced Raman scatterings;    Vanadium oxides;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/478/1/012016/pdf
DOI  :  10.1088/1742-6596/478/1/012016

来源: IOP

【 摘 要 】

This paper presents a modified dc-pulsed low voltage electrochemical method in which a duty cycle is self tuned while etching. A higher yield of gold tips suitable for performing tip-enhanced Raman scattering (TERS) measurements is demonstrated. The improvement is caused by the self-control of the etching rate along the full surface of the tip. A capability of the gold tips to enhance a Raman signal is exemplified by TERS spectroscopy of single walled carbon nanotubes bundle, sulfur and vanadium oxide.