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Monolayer Two‐dimensional Molecular Crystals for an Ultrasensitive OFET‐based Chemical Sensor
Author(s) -
Li Haiyang,
Shi Yanjun,
Han Guangchao,
Liu Jie,
Zhang Jing,
Li Chunlei,
Liu Jie,
Yi Yuanping,
Li Tao,
Gao Xike,
Di Chongan,
Huang Jia,
Che Yanke,
Wang Dong,
Hu Wenping,
Liu Yunqi,
Jiang Lang
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201916397
Subject(s) - monolayer , analyte , detection limit , materials science , organic field effect transistor , nanotechnology , molecule , crystal (programming language) , chemistry , chromatography , organic chemistry , transistor , field effect transistor , computer science , physics , voltage , quantum mechanics , programming language
The sensitivity of conventional thin‐film OFET‐based sensors is limited by the diffusion of analytes through bulk films and remains the central challenge in sensing technology. Now, for the first time, an ultrasensitive (sub‐ppb level) sensor is reported that exploits n‐type monolayer molecular crystals (MMCs) with porous two‐dimensional structures. Thanks to monolayer crystal structure of NDI3HU‐DTYM2 (NDI) and controlled formation of porous structure, a world‐record detection limit of NH 3 (0.1 ppb) was achieved. Moreover, the MMC‐OFETs also enabled direct detection of solid analytes of biological amine derivatives, such as dopamine at an extremely low concentration of 500 ppb. The remarkably improved sensing performances of MMC‐OFETs opens up the possibility of engineering OFETs for ultrasensitive (bio)chemical sensing.