High-sensitivity ethanol vapor detection using In₂O₃@ZnO core-shell nanomeshes fabricated <i>via</i> block copolymer templating.

ABSTRACT: Metal-oxide semiconductor nanowires are promising building blocks for high-performance gas sensors due to their high specific surface area and tunable electronic properties. In this work, we adapted a single-step synthesis based on block copolymer templates to fabricate indium oxide (In₂O₃) nanowires subsequently coated with a thin layer of zinc oxide (ZnO) via atomic layer deposition (ALD). The optimized core-shell heteronanostructures, featuring a 10 nm-thick ZnO shell and annealed at 400 °C, exhibited a markedly enhanced electrical response measured as a resistance ratio in the absence and presence of ethanol vapors (R ₀/R ≈ 245 at 100 ppm), as well as high sensitivity (≈2.28 ppm^-1) in the 10-100 ppm range as compared to b

SUBMITTER: Pula P 

PROVIDER: S-EPMC12822549 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature