Graphene nanosheet-grafted double-walled carbon nanotube hybrid nanostructures by two-step chemical vapor deposition and their application for ethanol detection
| dc.contributor.author | Muangrat, Worawut | |
| dc.contributor.author | Wongwiriyapan, Winadda | |
| dc.contributor.author | Morimoto, Shingo | |
| dc.contributor.author | Hashimoto, Yoshio | |
| dc.date.accessioned | 2026-08-06T10:26:33Z | |
| dc.date.available | 2026-08-06T10:26:33Z | |
| dc.date.issued | 2019-12-01 | |
| dc.description.abstract | Here, we present a facile technique for synthesis of graphene nanosheet (GNS)-grafted double-walled carbon nanotube (DWCNT) hybrid carbon nanostructures (here after referred to as G-DWCNTs) by directly growing GNSs along the sidewalls of DWCNTs using a two-step chemical vapor deposition (CVD). DWCNTs were synthesized by floating catalyst CVD at 1300 °C using ferrocene and thiophene dissolved in ethanol. Then, GNSs were grafted onto the synthesized DWCNT bundles by thermal CVD at 1300 °C using ethanol. The sharp-edged petal-like structure of GNSs were grown along the sidewalls of DWCNT bundles while maintaining the one-dimensional structure of DWCNT. Next, DWCNTs and G-DWCNTs were dispersed in ethanol, then deposited on the paper using vacuum filtration method and used for ethanol detection. G-DWCNTs sensor exhibited a 3-fold improvement in the response to ethanol vapor compared to the DWCNTs sensor. The sensing mechanism of DWCNTs and G-DWCNTs can be described in terms of charge transfer between the gas molecules and sensing material. These results demonstrate that the facile technique by two-step CVD method provides a promising approach for simple and low-cost technique to synthesize the hybrid nanostructure of GNSs and DWCNTs. The new hybrid carbon nanostructures are attractive for gas sensing application. | |
| dc.identifier.citation | Scientific Reports, 9(1), 2019 | |
| dc.identifier.doi | 10.1038/s41598-019-44315-y | |
| dc.identifier.issn | 20452322 | |
| dc.identifier.other | 2-s2.0-85066232548 | |
| dc.identifier.uri | https://dspace.kmitl.ac.th/handle/123456789/10412 | |
| dc.source | Scientific Reports | |
| dc.title | Graphene nanosheet-grafted double-walled carbon nanotube hybrid nanostructures by two-step chemical vapor deposition and their application for ethanol detection | |
| dc.type | Article |