期刊
RESEARCH
卷 2020, 期 -, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.34133/2020/2196063
关键词
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资金
- Southern University of Science and Technology
- Shenzhen Science and Technology Innovation Committee [JCYJ20170412154426330]
- Foundation for Distinguished Young Talents in Higher Education of Guangdong, China [2018KQNX226]
- Guangdong Natural Science Funds [2016A030306042, 2018A050506001]
Exhaled acetone is one of the representative biomarkers for the noninvasive diagnosis of type-1 diabetes. In this work, we have applied a facile two-step chemical bath deposition method for acetone sensors based on alpha-Fe-2 O-3/SnO2 hybrid nanoarrays (HNAs), where one-dimensional (1D) FeOOH nanorods are in situ grown on the prefabricated 2D SnO2 nanosheets for on-chip construction of 1D/2D HNAs. After annealing in air, ultrafine alpha-Fe2O3 nanorods are homogenously distributed on the surface of SnO2 nanosheet arrays (NSAs). Gas sensing results show that the alpha-Fe2O3/SnO2 HNAs exhibit a greatly enhanced response to acetone (3.25 at 0.4 ppm) at a sub-ppm level compared with those based on pure SnO2 NSAs (1.16 at 0.4 ppm) and pure alpha-Fe2O3 nanorods (1.03 at 0.4 ppm), at an operating temperature of 340 degrees C. The enhanced acetone sensing performance may be attributed to the formation of alpha-Fe2O3-SnO2 n-n heterostructure with 1D/2D hybrid architectures. Moreover, the alpha-Fe2O3/SnO2 HNAs also possess good reproducibility and selectivity toward acetone vapor, suggesting its potential application in breath acetone analysis.
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