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http://dx.doi.org/10.5369/JSST.2016.25.3.223

Bio-inspired Cr2O3 and Co3O4 Nanoparticles Loaded Electrospun WO3 Nanofiber Chemical Sensor for Early Diagnosis of Halitosis  

Jang, Ji-Soo (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Kim, Sang-Joon (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Choi, Seon-Jin (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Koo, Won-Tae (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Kim, Il-Doo (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Publication Information
Journal of Sensor Science and Technology / v.25, no.3, 2016 , pp. 223-228 More about this Journal
Abstract
In this work, we prepared porous WO3 nanofibers (NFs) functionalized by bio-inspired catalytic $Cr_2O_3$ and $Co_3O_4$ nanoparticles as highly sensitive and selective $H_2S$ gas sensing layers. Highly porous 3-dimensional (3D) NFs networks decorated by well-dispersed catalyst NPs exhibited superior $H_2S$ gas response ($R_{air}/R_{gas}$ = 46 at 5 ppm) in high humidity environment (95 %RH). In particular, the sensors showed outstanding $H_2S$ selectivity against other interfering analytes (such as acetone, toluene, CO, $H_2$, ethanol). Exhaled breath sensors using $Cr_2O_3$ and $Co_3O_4$ catalysts-loaded $WO_3$ NFs are highly promising for the accurate detection of halitosis.
Keywords
$WO_3$ NFs; Apoferritin; Electrospinning; Halitosis; Exhaled breath sensors;
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