Complex Electron Transfer Pathway at a Microelectrode Captured by in Situ Nanospectroscopy | Zendy

Thomas Touzalin | Zendy; Suzanne Joiret | Zendy; Emmanuel Maisonhaute | Zendy; Ivan T. Lucas | Zendy

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Complex Electron Transfer Pathway at a Microelectrode Captured by in Situ Nanospectroscopy

Author(s) -

Thomas Touzalin,

Suzanne Joiret,

Emmanuel Maisonhaute,

Ivan T. Lucas

Publication year - 2017

Publication title -

analytical chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.117

H-Index - 332

eISSN - 1520-6882

pISSN - 0003-2700

DOI - 10.1021/acs.analchem.7b01542

Subject(s) - microelectrode , chemistry , raman spectroscopy , in situ , characterization (materials science) , nanotechnology , electron transfer , electrochemistry , nanoscopic scale , substrate (aquarium) , electrode , materials science , optics , photochemistry , physics , oceanography , organic chemistry , geology

In the quest for analytical tools which enable the characterization of materials at the nanoscale and under the condition of their operation (in situ, operando), the emerging tip-enhanced Raman spectroscopy (TERS) now enters the spotlight. We demonstrate in this work that a TERS tip can be functionalized and partially insulated to be used as a microelectrode enabling electrochemical substrate enhanced Raman sectroscopy (EC-SERS) at a single hotspot. This "SERS at a tip" experiment enables one to capture the electrochemical transformation of a molecular layer self-assembled on a tapered gold microelectrode. The proposed setup and protocol open new perspectives in the characterization and development of complex redox architectures for molecular devices.

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