Enrichment of Semiconducting Single-Walled Carbon Nanotubes with Indigo-Fluorene-Based Copolymers and Their Use in Printed Thin-Film Transistors and Carbon Dioxide Gas Sensors

被引:37
作者
Guo, Chang [1 ]
Ouyang, Jianying [1 ]
Shin, Homin [1 ]
Ding, Jianfu [1 ]
Li, Zhao [1 ]
Lapointe, Francois [1 ]
Lefebvre, Jacques [1 ]
Kell, Arnold J. [1 ]
Malenfant, Patrick R. L. [1 ]
机构
[1] Natl Res Council Canada, Secur & Disrupt Technol Portfolio, Ottawa, ON K1A 0R6, Canada
来源
ACS SENSORS | 2020年 / 5卷 / 07期
关键词
polymeric materials; high-purity semiconducting SWCNT; thin-film transistors; carbon dioxide sensor; printed and flexible electronics; LARGE-DIAMETER; HEALTH; ADSORPTION; EXTRACTION; DISPERSION; STABILITY; NETWORKS; KINETICS; DENSITY; HYBRID;
D O I
10.1021/acssensors.0c00764
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
High-purity semiconducting single-walled carbon nanotubes (sc-SWCNTs) are promising for portable and high-sensitivity gas sensors because of their excellent physical and electrical properties. Here, we describe the synthesis of a novel indigo-fluorene-based copolymer (PFIDBoc) that has been designed to selectively enrich sc-SWCNTs with excellent purity (>99.9%) yet contain a latent function in the form of a tert-butoxy (t-BOC)-protected amine that can be later revealed and exploited for carbon dioxide (CO2) gas sensing. SWCNTs wrapped with the PFIDBoc polymer can be easily converted via an on-chip thermal process to reveal a vinylogous amide moiety with a secondary amine nitrogen within the indigo building block of the copolymer which is perfectly suited for CO2 recognition. Thin-film transistors and sensors were inkjet-printed onto rigid and flexible substrates, demonstrating the versatility of enriched PFIDBoc-derived sc-SWCNT dispersions. The printed transistors exhibited a mobility up to 9 cm(2) V-1 s(-1) and on/off current ratios >10(5). We further demonstrate herein a CO2 sensor for indoor air quality monitoring even in low humidity environments, possessing a linear response with up to similar to 5.4% sensitivity and a dynamic range between 400 and 2000 ppm in air with a relative humidity of similar to 40%.
引用
收藏
页码:2136 / 2145
页数:10
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