pH Sensor Based on Supramolecular Host-Guest Interactions and an Organic Field-Effect Transistor with a Magnetic Carbon Gate Electrode

被引：1
作者：
Tamayo, Adrian [1 ]
Campos-Lendinez, Angel [1 ]
Munoz, Jose [1 ]
Crivillers, Nuria [1 ]
Mas-Torrent, Marta [1 ]
机构：
[1] Inst Ciencia Mat Barcelona ICMAB CSIC, Barcelona 08193, Spain
来源：
CHEMISTRY OF MATERIALS | 2023年 / 35卷 / 21期
关键词：
QUANTUM DOTS; LIGAND; SEPARATION; IMIDAZOLE;
D O I：
10.1021/acs.chemmater.3c02034
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A robust electrolyte-gated organic field-effect transistor (EGOFET) able to respond to pH in the range 1-10 is reported. This is realized by exploiting the pH-dependent supramolecular host-guest complexation of imidazole/beta-cyclodextrin (beta-CD). The sensing protocol is performed by incubating magnetic nanoparticles functionalized with beta-CD with imidazole solutions at different pHs and trapping them in a magnetic carbon electrode. Such an electrode is then implemented as gate contact in the EGOFET. At higher pH, the complexation is more favored, resulting in a negative shift of the device transfer characteristics. Remarkably, the carbon gate electrode can be polished and reused and the devices show high stability and reproducibility.
引用
收藏
页码：9257 / 9263
页数：7
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