期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201905361
关键词
ascorbic acid sensors; dopamine sensors; flexible organic electrochemical transistors; nitrogen; oxygen-codoped carbon cloths; surface engineering
类别
资金
- National Natural Science Foundation of China [61575121, 51772189, 21720102002, 21772120, 21572132]
- Science and Technology Commission of Shanghai Municipality [16JC1400703]
Organic electrochemical transistors (OECTs) provide the opportunity to fabricate flexible biosensors with high sensitivity. However, there are currently very few methods to improve the selectivity of OECT sensors. In this work, nitrogen/oxygen-codoped carbon cloths (NOCCs) are prepared by the carbonization of polyaniline-wrapped carbon cloths at 750 degrees C under different atmospheres. The resulting NOCC electrodes exhibit different electrochemical sensing behaviors toward ascorbic acid (AA) and dopamine (DA), enabling the fabrication of OECT sensors with high sensitivity and selectivity that are comparable to the state-of-the-art OECT sensors for AA and DA. The structural characterization and theoretical calculation reveal that the electrochemical sensing behaviors of the NOCC electrodes are closely related to their surface compositions, providing an unprecedented strategy for the design of flexible OECT sensors with high sensitivity and selectivity.
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