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Issue 7, 2016
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Fast patterning of oriented organic microstripes for field-effect ammonia gas sensors

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Abstract

A series of organic field-effect transistors (OFETs) with patterned ultra-thin films for NH3 detection are achieved via fast dip-coating. The morphology and packing structure of the ultra-thin films are greatly dependent on the surface energy of the substrates, geometry features of the patterned electrodes and evaporation atmosphere during the dip-coating process, which in turn results in a significant difference in the NH3 sensing properties. Based on the newly proposed mechanism, low-trap dielectric-semiconductor interfaces, a stripe-like morphology and an ultrathin film (as low as 2 nm) enable the OFET-based sensors to exhibit unprecedented sensitivity (∼160) with a short response/recovery time. The efficient (2 mm s−1), reliable, and scalable patterning strategy opens a new route for solution-processed OFET-based gas sensors.

Graphical abstract: Fast patterning of oriented organic microstripes for field-effect ammonia gas sensors

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Supplementary files

Article information


Submitted
18 Dec 2015
Accepted
21 Jan 2016
First published
25 Jan 2016

Nanoscale, 2016,8, 3954-3961
Article type
Communication

Fast patterning of oriented organic microstripes for field-effect ammonia gas sensors

B. Wang, J. Ding, T. Zhu, W. Huang, Z. Cui, J. Chen, L. Huang and L. Chi, Nanoscale, 2016, 8, 3954
DOI: 10.1039/C5NR09001F

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