Monolayer Two-dimensional Molecular Crystals for Ultrasensitive OFET-based Chemical Sensor.

Monolayer Two-dimensional Molecular Crystals for Ultrasensitive OFET-based Chemical Sensor.
Angew Chem Int Ed Engl. 2020 Jan 15;:
Authors: Jiang L, Li H, Shi Y, Han G, Liu J, Zhang J, Li C, Liu J, Yi Y, Li T, Gao X, Di C, Huang J, Che Y, Wang D, Hu W, Liu Y
Abstract
The sensitivity of conventional thin film OFETs-based sensors is limited by the diffusion of analytes through bulk films, and remains the central challenge in sensing technology. Here, for the first time we reported an ultrasensitive (sub-ppb level) sensor exploiting 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 open up the possibility of engineering OFETs for ultrasensitive (bio)chemical sensing.
PMID: 31943644 [PubMed - as supplied by publisher]

Source: Angewandte Chemie - January 14, 2020 Category: Chemistry Authors: Jiang L, Li H, Shi Y, Han G, Liu J, Zhang J, Li C, Liu J, Yi Y, Li T, Gao X, Di C, Huang J, Che Y, Wang D, Hu W, Liu Y Tags: Angew Chem Int Ed Engl Source Type: research