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This narrow acetone concentra- tion range to distinguish healthy and ill people requires chemoresistive sensors with high sensitivity and selectivity, combined with reduced lower limit detection (LDL). To overcome these issues, several n-type and p-type SMOx, such as WO3 [2,3,5], SnO2 [5,...
The long-range ordered 3D porous structure produces nanopores of~2–5 nm in size. But the excess KOH induces aggregation and strong gas formation, resulting in the bulk composite. The high SSA, improved mass transfer, open and porous nanostructure, and more active sites contributed to ...