biostudies-literatureZhang PNatural Science Foundation of Shandong ProvinceNational Natural Science Foundation of ChinaNational College Students Innovation and Entrepreneurship Training Program8332-8339https://www.ebi.ac.uk/biostudies/studies/S-EPMC9049979biostudies-literatureUnknown10(14)2D heterostructures are promising gas sensor materials due to their surface/interface effects and hybrid properties. In this research, Cu₂O/Fe₂O₃ heterostructure ordered arrays were synthesized using an <i>in situ</i> electrodeposition method for H₂S detection at low temperatures. These arrays possess a periodic long range ordered structure with horizontal multi-heterointerfaces, leading to superior gas sensitivity for synergistic effects at the heterointerfaces. The sensor based on the Cu₂O/Fe₂O₃ heterostructure ordered arrays exhibits a dramatic improvement in H₂S detection at low temperatures (even as low as -15 °C). The response is particularly significant at room and human body temperatures since tRSC advancesH₂S detection at low temperatures by Cu₂O/Fe₂O₃ heterostructure ordered array sensors.PMC9049979JQ201602ZR2016AL0911634007201810452056201810452004ZR2019MA03311704168ZR2018MA038116741445143100411404158Li JShi CChen LWang DCui GZhu HWang XXue KZhang PfalseH₂S detection at low temperatures by Cu₂O/Fe₂O₃ heterostructure ordered array sensors.2D heterostructures are promising gas sensor materials due to their surface/interface effects and hybrid properties. In this research, Cu₂O/Fe₂O₃ heterostructure ordered arrays were synthesized using an <i>in situ</i> electrodeposition method for H₂S detection at low temperatures. These arrays possess a periodic long range ordered structure with horizontal multi-heterointerfaces, leading to superior gas sensitivity for synergistic effects at the heterointerfaces. The sensor based on the Cu₂O/Fe₂O₃ heterostructure ordered arrays exhibits a dramatic improvement in H₂S detection at low temperatures (even as low as -15 °C). The response is particularly significant at room and human body temperatures since t2020-01-01T00:00:00Z2020 Feb2025-04-19T00:42:31.255Z2025-04-07T11:44:55.156ZS-EPMC90499793549786410.1039/c9ra10054g