Extremely sensitive and selective sub-ppm CO detection by the synergistic effect of Au nanoparticles and core–shell nanowires
作者： Jae-Hun Kim , Ali Mirzaei , Hyoun Woo Kim , Sang Sub Kim
DOI: 10.1016/J.SNB.2017.04.090
关键词:
摘要: Abstract An extremely sensitive CO sensor based on novel hybrid SnO 2 –ZnO core–shell (C–S) nanowires (NWs) functionalized by Au nanoparticles (NPs) was synthesized. First, networked NWs were successfully prepared using the vapor–liquid–solid growth method an electrode layer with special patterns. A ZnO shell subsequently coated core atomic deposition, and NPs then attached onto γ-ray radiolysis. The resulting exhibited a very high response of 26.6–100 ppb gas. Furthermore, responses to other gases such as C 6 H 7 low, indicating good selectivity Besides acting heterojunctions, catalytic effect gas greatly improved sensing capability Au-functionalized C–S NWs. sensitivity this can open path for prompt toxic monitoring early detection fatal diseases related CO.
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