Fig. 4
From: SnO2 nanostructure-based acetone sensors for breath analysis
Copyright (2021) Elsevier
Various nanostructures-based acetone sensors. (a1, a2) Ruthenium (Ru)-doped SnO2 nanofibers [Reprinted from [84] with permission from Elsevier. Copyright (2020) Elsevier]. (b1, b2) Hierarchical assembly of SnO2 nanorods on spindle-like α-Fe2O3 [Reprinted from [49] with permission from Elsevier. Copyright (2021) Elsevier]. (c1, c2) Catalyst-free highly sensitive SnO2 nanosheet [Reprinted from [66] with permission from American Chemical Society. Copyright (2020) American Chemical.]. (d1, d2) α-Fe2O3/SnO2 nanoball arrays [Reprinted from [96] with permission from John Wiley and Sons. Copyright (2020) John Wiley and Sons.]. (e1, e2) Co3O4/SnO2 yolk-shell nanofibers [Reprinted from [34] with permission from Elsevier. Copyright (2024) Elsevier]. (f1, f2) metal–organic framework-derived SnO2-ZnO [Reprinted from [37] with permission from Elsevier. Copyright (2023) Elsevier]. (g1, g2) Co-catalyzed SnO2 nanospheres [Reprinted from [73] with permission from Elsevier. Copyright (2020) Elsevier]. (h1, h2) Pt catalyst decorated SnO2 porous nanofibers [Reprinted from [91] with permission from Elsevier. Copyright (2022) Elsevier] and (i1, i2) hollow hierarchical TiO2-SnO2-TiO2 composite nanofibers Reprinted from [47] with permission from Elsevier