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Analytical Letters Volume 49, 2016 - Issue 2
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Vibrational Spectroscopy

Porous and Dendritic Structure of Screen-Printed Electrode for in-situ Electrochemical Surface-Enhanced Raman Scattering

Yuanjie TengState Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang Province, ChinaCorrespondence[email protected]
,
Wenhan LiuState Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang Province, China
,
Minbo LanShanghai Key Laboratory of Functional Materials Chemistry, and Research Center of Analysis and Test, East China University of Science and Technology, Shanghai, China
,
Suzhen MaState Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang Province, China
&
Chunan MaState Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang Province, China
Pages 299-306 | Received 14 Jan 2015, Accepted 02 Jul 2015, Published online: 03 Nov 2015
 
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ABSTRACT

A new surface-enhanced Raman scattering (SERS) screen-printed electrode was prepared by simultaneously reducing Ag+ and H+ at a high potential. The Na2S2O3, which has a large cumulative formation constant with Ag+, was introduced to remove the background Raman interference of Ag2SO4 from the electrolyte. Scanning electron micrographs showed that the SERS electrode presented porous and dendritic nanostructures using 0.01 M Ag2SO4 and 0.6 M H2SO4, a current density of 0.425 A/cm2, and a deposition time of 30 s. The porous (roughness factor of 78.66) and dendritic structure contributed to the SERS enhancement factor of 3.36 × 104. The electrochemistry of pyridine was characterized on the SERS electrode and in-situ detection was demonstrated.

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