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. Author manuscript; available in PMC: 2024 Jul 4.
Published in final edited form as: ACS Nano. 2023 Mar 9;17(6):5211–5295. doi: 10.1021/acsnano.2c12606

Figure 5.

Figure 5.

Selective gas sensors. (a) Overview of the strategies to achieve selective gas sensing, including specific sensing materials and selective sensing arrays. Flexible gas sensors target applications in health monitoring and point-of-care diagnostics. AI, artificial intelligence. (b) Examples of metal–organic framework-based nanomaterials with high sensing specificity to gas molecules. Cu3-(HHTP)2 (HHTP=2,3,6,7,10,11-hexahydroxytriphenylene) thin film for room-temperature NH3 detection. Adapted with permission from ref 139. Copyright 2017 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim. Bimetallic nanoparticles (PtRu) confined in two-dimensional Cu3-(HHTP)2 for NO2 detection. Adapted with permission from ref 140. Copyright 2021 Wiley-VCH GmbH. Zn-based zeolite imidazole framework (ZIF-8) as molecular sieving layer for selective H2 filtration on Pd nanowires. Adapted with permission from ref 141. Copyright 2017 American Chemical Society. (c) An example of nanomaterial-based selective sensing array for volatile organic compound (VOC) identification. A graphene-based stretchable chemiresistive sensor array for identification of 13 plant VOCs. Reproduced with permission from ref 142. Copyright 2021 Elsevier.