Premium
Highly Sensitive Field‐Effect Ammonia/Amine Sensors with Low Driving Voltage Based on Low Bandgap Polymers
Author(s) -
Wang Zhijie,
Liu Zitong,
Chen Liangliang,
Yang Yang,
Ma Jing,
Zhang Xisha,
Guo Yunlong,
Zhang Guanxin,
Zhang Deqing
Publication year - 2018
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.201800025
Subject(s) - materials science , ammonia , band gap , polymer , amine gas treating , food spoilage , thiophene , nanotechnology , optoelectronics , field effect , field effect transistor , transistor , voltage , electrical engineering , organic chemistry , chemistry , composite material , biology , bacteria , genetics , engineering
Ammonia/amine gas sensors have received increasing attention in recent years, due to their applications in monitoring of meat and seafood spoilage and air pollution as well as diagnosis of chronic diseases. Herein, a new conjugated polymer PTTEH is developed, which is composed of thieno[3,4‐ b ]thiophene units, with very low bandgap. The low bandgap and the existence of radical state endow the polymer thin film with good electrical conductivity. As a result, PTTEH is successfully utilized for construction of a field‐effect transistor (FET) sensor for ammonia and amines at low driving voltages, which are advantageous for practical applications. Moreover, this FET sensor shows good selectivity and high sensitivity (down to 10 ppb) toward ammonia and amines. Accordingly, the real‐time monitoring of meat spoilage is achieved with this FET sensor. These studies will open a new venue to fabricate sensitive, portable, and small size sensors for real‐time monitoring of chemical vapors.