Grain-Size-Tuned Highly H2-Selective Chemiresistive Sensors Based on ZnO–SnO2 Composite Nanofibers
Source abstract
Abstract
We investigated the effect of grain size on the H2-sensing behavior of SnO2-ZnO composite nanofibers. The 0.9SnO2-0.1ZnO composite nanofibers were calcined at 700 °C for various times to control the size of nanograins. A bifunctional sensing mechanism, which is related not only to the SnO2-SnO2 nanograins, but also to the ZnO-SnO2 nanograins with surface metallization effect, is responsible for the grain-oriented H2-sensing properties and the selective improvement in sensing behavior to H2 gas compared to other gases. Smaller grains are much more favorable for superior H2 sensing in SnO2-ZnO composite nanofibers, which will be an important guideline for their use in H2 sensors. The one-dimensional nanofiber-based structures in the present study will be efficient in maximizing the sensing capabilities by providing a larger amount of junctions.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors · Advanced Chemical Sensor Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science and Engineering, Inha University, Incheon 402-751, Republic of Korea
Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea
Funding
National Research Foundation of Korea
References (45)
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