Novel Electrochemical Raman Spectroscopy Enabled by Water Immersion Objective.
Electrochemical Raman spectroscopy is a powerful molecular level diagnostic technique for in situ investigation of adsorption and reactions on various material surfaces. However, there is still a big room to improve the optical path to meet the increasing request of higher detection sensitivity and spatial resolution. Herein, we proposed a novel electrochemical Raman setup based on a water immersion objective. It dramatically reduces mismatch of the refractive index in the light path. Consequently, significant improvement in detection sensitivity and spatial resolution has been achieved from both Zemax simulation and the experimental results. Furthermore, the thickness of electrolyte layer could be expanded to 2 mm without any influence on the signal collection. Such a thick electrolyte layer allows a much normal electrochemical response during the spectroelectrochemical investigations of the methanol oxidation.
State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory of Analytical Sciences, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
Zhi-Cong
ZC
Zeng
State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory of Analytical Sciences, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
Shu
S
Hu
State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory of Analytical Sciences, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
Sheng-Chao
SC
Huang
State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory of Analytical Sciences, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
Yue-Jiao
YJ
Zhang
Nanjing OPTOTEK Technology Co., Ltd., Nanjing 211100, China.
Wei-Xing
WX
Zhao
State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory of Analytical Sciences, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
Jian-Feng
JF
Li
Department of Chemistry, University of South Dakota , Vermillion, South Dakota 57069, United States.
Chaoyang
C
Jiang
State Key Laboratory of Physical Chemistry of Solid Surface, Key Laboratory of Analytical Sciences, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
Bin
B
Ren