.png){kind=icon}
返回
Micro Reference Electrode with an Ultrathin Ionic Path
.png){kind=icon}
PRE
AI
DOI：10.1021/acs.analchem.4c02267.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Reference electrode (RE) plays the core role in accurate potential control in electrochemistry. However, nanoresolved electrochemical characterization techniques still suffer from unstable potential control of pseudo-REs, because the commercial RE is too large to be used in the tiny electrochemical cell, and thus only pseudo-RE can be used. Therefore, microsized RE with a stable potential is urgently required to push the nanoresolved electrochemical measurements to a new level of accuracy and precision, but it is quite challenging to reproducibly fabricate such a micro RE until now. Here, we revisited the working mechanism of the metal-junction RE and clearly revealed the role of the ionic path between the metal wire and the borosilicate glass capillary to maintain a stable potential of RE. Based on this understanding, we developed a method to fabricate micro ultrastable-RE, where a reproducible ultrathin ionic path can form by dissolving a sandwiched sacrificial layer between the Pt wire and the capillary for the ion transfer. The potential of this new micro RE was almost the same as that of the commercial Ag/AgCl electrode, while the size is much smaller. Different from commercial REs that must be stored in the inner electrolyte, the new RE could be directly stored in air for more than one year without potential drift. Eventually, we successfully applied the micro RE in the electrochemical tip-enhanced Raman spectroscopy (EC-TERS) measurement to precisely control the potential of the working electrode, which makes it possible to compare the results from different laboratories and techniques to better understand the electrochemical interface at the nanoscale.
Keyword:
ELECTROCHEMICAL-CELL MICROSCOPY
QUASI-REFERENCE ELECTRODE
TIPS
期刊
IF:
6.7
论文数:
4.7W
被引数:
15.9W
机构
引用论文
Electrochemical Tip-Enhanced Raman Spectroscopy with Improved Sensitivity Enabled by a Water Immersion Objective.png)
ANALYTICAL CHEMISTRY
ANALYTICAL CHEMISTRYIF6.7
PREAI
分享收藏Probing nanoscale spatial distribution of plasmonically excited hot carriersNATURE COMMUNICATIONS
OAAI
NATURE COMMUNICATIONSIF15.7
OAAI分享收藏Physiologic Concepts That May Revise the Interpretation and Implications of HbA1C in Clinical Medicine生理学概念可能会修改临床医学中HbA1C的解释和含义
OAAI
OAAI分享收藏分享收藏Scanning Electrochemical Cell Microscopy: A Versatile Technique for Nanoscale Electrochemistry and Functional Imaging扫描电化学细胞显微镜: 一种用于纳米级电化学和功能成像的通用技术OAAI
OAAI分享收藏
查看更多内容