The long-range effect induced by untying hydrogen bonds for single cell test using SECM
The long-range effect induced by untying hydrogen bonds for single cell test using SECM
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DOI：
10.1016/j.electacta.2016.04.174
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发表时间：
2016-07
影响因子：
6.6
通讯作者：
Qing Zheng;Yifan Yang;Yuanyuan Yan;Yu Yu-Yu;Yao Liu;Wenyu Gao;Kejian Ding;H. Shao
中科院分区：
文献类型：
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作者：
Qing Zheng;Yifan Yang;Yuanyuan Yan;Yu Yu-Yu;Yao Liu;Wenyu Gao;Kejian Ding;H. Shao
The enhanced positive feedback current of scanning electrochemical microscopy (SECM) is observed at a large separation between the tip and the substrate surface in the case of a 3-mercaptopropionic acid (3-MPA) self-assembled monolayer (SAM). The effect that induces the large separation (named the long-range effect) is confirmed by SECM and quantitatively studied by electrochemical quartz crystal microbalance (EQCM). A key finding is that the long-range effect results from untying hydrogen bonds beforehand formed between the hydroxyl group of tip redox species and the carboxyl group of 3-MPA SAM. It is found that the long-range effect is increased with the packing density of the 3-MPA SAM. On the basis of these findings, the long-range effect is applied to the nondestructive test of living cells using SECM.
