@article{62ba172ca6774c93af6407d5defb9f1f,
title = "Surface Functionalized Sensors for Humidity-Independent Gas Detection",
abstract = "Semiconducting metal oxides (SMOXs) are used widely for gas sensors. However, the effect of ambient humidity on the baseline and sensitivity of the chemiresistors is still a largely unsolved problem, reducing sensor accuracy and causing complications for sensor calibrations. Presented here is a general strategy to overcome water-sensitivity issues by coating SMOXs with a hydrophobic polymer separated by a metal–organic framework (MOF) layer that preserves the SMOX surface and serves a gas-selective function. Sensor devices using these nanoparticles display near-constant responses even when humidity is varied across a wide range [0–90 % relative humidity (RH)]. Furthermore, the sensor delivers notable performance below 20 % RH whereas other water-resistance strategies typically fail. Selectivity enhancement and humidity-independent sensitivity are concomitantly achieved using this approach. The reported tandem coating strategy is expected to be relevant for a wide range of SMOXs, leading to a new generation of gas sensors with excellent humidity-resistant performance.",
keywords = "hydrophobicity, metal oxides, metal–organic frameworks, nanoparticles, semiconductors, sensors",
author = "Fengdong Qu and Shendan Zhang and Chaozhu Huang and Xuyun Guo and Ye Zhu and Tiju Thomas and Haichuan Guo and Attfield, {J. Paul} and Minghui Yang",
note = "Funding Information: This work is supported by the National Natural Science Foundation of China (Grant No. 61971405), National Key Research and Development Plan (Grant No. 2016YFB0101205), and the Science and Technology Foundation of Ningbo, China (Grant No. 2019C50010). J.P.A. thanks EPSRC for support. J.P.A. and M.Y. thank for the Ningbo 3315 program. T.T. thanks the Department of Science and Technology Government of India for financial support via “DST Solar Energy Harnessing Center‐DSEHC” and the “Materials for energy storage” program. Funding Information: This work is supported by the National Natural Science Foundation of China (Grant No. 61971405), National Key Research and Development Plan (Grant No. 2016YFB0101205), and the Science and Technology Foundation of Ningbo, China (Grant No. 2019C50010). J.P.A. thanks EPSRC for support. J.P.A. and M.Y. thank for the Ningbo 3315 program. T.T. thanks the Department of Science and Technology Government of India for financial support via ?DST Solar Energy Harnessing Center-DSEHC? and the ?Materials for energy storage? program. Publisher Copyright: {\textcopyright} 2020 Wiley-VCH GmbH",
year = "2021",
month = mar,
day = "15",
doi = "10.1002/anie.202015856",
language = "English",
volume = "60",
pages = "6561--6566",
journal = "Angewandte Chemie - International Edition",
issn = "1433-7851",
publisher = "John Wiley and Sons Ltd",
number = "12",
}