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- W3049523423 abstract "Acetone is a toxic air pollutant and a key breath marker for non-invasively monitoring fat metabolism. Its routine detection in realistic gas mixtures (i.e., human breath and indoor air), however, is challenging, as low-cost acetone sensors suffer from insufficient selectivity. Here, a compact detector for acetone sensing is introduced, having unprecedented selectivity (>250) over the most challenging interferants (e.g., alcohols, aldehydes, aromatics, isoprene, ammonia, H2, and CO). That way, acetone is quantified with fast response (<1 min) down to, at least, 50 parts per billion (ppb) in gas mixtures with such interferants having up to two orders of magnitude higher concentration than acetone at realistic relative humidities (RH = 30-90%). The detector consists of a catalytic packed bed (30 mg) of flame-made Al2O3 nanoparticles (120 m2 g-1) decorated with Pt nanoclusters (average size 9 nm) and a highly sensitive chemo-resistive sensor made by flame aerosol deposition and in situ annealing of nanostructured Si-doped ε-WO3 (Si/WO3). Most importantly, the catalytic packed bed converts interferants continuously enabling highly selective acetone sensing even in the exhaled breath of a volunteer. The detector exhibits stable performance over, at least, 145 days at 90% RH, as validated by mass spectrometry." @default.
- W3049523423 created "2020-08-21" @default.
- W3049523423 creator A5002304047 @default.
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- W3049523423 creator A5063774939 @default.
- W3049523423 date "2020-08-16" @default.
- W3049523423 modified "2023-10-12" @default.
- W3049523423 title "Superior Acetone Selectivity in Gas Mixtures by Catalyst‐Filtered Chemoresistive Sensors" @default.
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- W3049523423 doi "https://doi.org/10.1002/advs.202001503" @default.
- W3049523423 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7539217" @default.
- W3049523423 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33042762" @default.
- W3049523423 hasPublicationYear "2020" @default.
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