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| Content Provider | PubMed Central |
|---|---|
| Author | Tharsika, T. Haseeb, A. S. M. A. Akbar, Sheikh A. Sabri, Md. Faizul Mohd Yew, Hoong Wong |
| Copyright Year | 2014 |
| Abstract | An inexpensive single-step carbon-assisted thermal evaporation method for the growth of SnO2-core/ZnO-shell nanostructures is described, and the ethanol sensing properties are presented. The structure and phases of the grown nanostructures are investigated by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques. XRD analysis indicates that the core-shell nanostructures have good crystallinity. At a lower growth duration of 15 min, only SnO2 nanowires with a rectangular cross-section are observed, while the ZnO shell is observed when the growth time is increased to 30 min. Core-shell hierarchical nanostructures are present for a growth time exceeding 60 min. The growth mechanism for SnO2-core/ZnO-shell nanowires and hierarchical nanostructures are also discussed. The sensitivity of the synthesized SnO2-core/ZnO-shell nanostructures towards ethanol sensing is investigated. Results show that the SnO2-core/ZnO-shell nanostructures deposited at 90 min exhibit enhanced sensitivity to ethanol. The sensitivity of SnO2-core/ZnO-shell nanostructures towards 20 ppm ethanol gas at 400 °C is about ∼5-times that of SnO2 nanowires. This improvement in ethanol gas response is attributed to high active sensing sites and the synergistic effect of the encapsulation of SnO2 by ZnO nanostructures. |
| Related Links | http://dx.doi.org/10.3390/s140814586 |
| Ending Page | 14600 |
| Page Count | 15 |
| Starting Page | 14586 |
| File Format | |
| ISSN | 14248220 |
| e-ISSN | 14248220 |
| Journal | Sensors (Basel, Switzerland) |
| Issue Number | 8 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2014-08-01 |
| Access Restriction | Open |
| Rights Holder | MDPI |
| Subject Keyword | Electrical and Electronic Engineering Analytical Chemistry Atomic and Molecular Physics, and Optics Biochemistry Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Atomic and Molecular Physics, and Optics Instrumentation Analytical Chemistry Biochemistry Information Systems Electrical and Electronic Engineering |
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