Details

Autor(en) / Beteiligte

• Zeng, Zhi-Cong
• Huang, Sheng-Chao
• Wu, De-Yin
• Meng, Ling-Yan
• Li, Mao-Hua
• Huang, Teng-Xiang
• Zhong, Jin-Hui
• Wang, Xiang
• Yang, Zhi-Lin
• Ren, Bin

Titel

Electrochemical Tip-Enhanced Raman Spectroscopy

Ist Teil von

• Journal of the American Chemical Society, 2015-09, Vol.137 (37), p.11928-11931

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Interfacial properties are highly important to the performance of some energy-related systems. The in-depth understanding of the interface requires highly sensitive in situ techniques that can provide fingerprint molecular information at nanometer resolution. We developed an electrochemical tip-enhanced Raman spectroscopy (EC-TERS) by introduction of the light horizontally to the EC-STM cell to minimize the optical distortion and to keep the TERS measurement under a well-controlled condition. We obtained potential-dependent EC-TERS from the adsorbed aromatic molecule on a Au(111) surface and observed a substantial change in the molecule configuration with potential as a result of the protonation and deprotonation of the molecule. Such a change was not observable in EC-SERS (surface-enhanced), indicating EC-TERS can more faithfully reflect the fine interfacial structure than EC-SERS. This work will open a new era for using EC-TERS as an important nanospectroscopy tool for the molecular level and nanoscale analysis of some important electrochemical systems including solar cells, lithium ion batteries, fuel cells, and corrosion.