Fast patterning of oriented organic microstripes for field-effect ammonia gas sensors. Issue 7 (3rd February 2016)

• Record Type: Journal Article
• Authors: Wang, Binghao; Ding, Jinqiang; Zhu, Tao; Huang, Wei; Cui, Zequn; Chen, Jianmei; Huang, Lizhen; Chi, Lifeng
• Is Part Of: Nanoscale. Volume 8:Issue 7(2016)
• Page Start: 3954
• Page End: 3961
• Publication Date: 2016-02-03
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr09001f
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A series of organic field-effect transistors (OFETs) with patterned ultra-thin films for NH3 detection are achieved via fast dip-coating. 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.