In:
Advanced Science, Wiley, Vol. 9, No. 14 ( 2022-05)
Abstract:
Flexible and mechanically robust gas sensors are the key technologies for wearable and implantable electronics. Herein, the authors demonstrate the high‐performance, flexible nitrogen dioxide (NO 2 ) chemiresistors using a series of n‐type conjugated polymers (CPs: PNDIT2/IM‐ x ) and a polymer dopant (poly(ethyleneimine), PEI). Imine double bonds (C = N) are incorporated into the backbones of the CPs with different imine contents ( x ) to facilitate strong and selective interactions with NO 2 . The PEI provides doping stability, enhanced electrical conductivity, and flexibility. As a result, the NO 2 sensors with PNDIT2/IM‐0.1 and PEI (1:1 by weight ratio) exhibit outstanding sensing performances, such as excellent sensitivity (Δ R / R b = 240% @ 1 ppm), ultralow detection limit (0.1 ppm), high selectivity (Δ R / R b 〈 8% @ 1 ppm of interfering analytes), and high stability, thereby outperforming other state‐of‐the‐art CP‐based chemiresistors. Furthermore, the thin film of PNDIT2/IM‐0.1 and PEI blend is stretchable and mechanically robust, providing excellent flexibility to the NO 2 sensors. Our study contributes to the rational design of high‐performance flexible gas sensors.
Type of Medium:
Online Resource
ISSN:
2198-3844
,
2198-3844
DOI:
10.1002/advs.202200270
Language:
English
Publisher:
Wiley
Publication Date:
2022
detail.hit.zdb_id:
2808093-2
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