논문 상세보기
Influence of sulfur promoter on electrical conductivity in direct‑spun carbon nanotube fibers KCI 등재
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/444458
Carbon nanotube (CNT) fibers were synthesized in this study under a hydrogen atmosphere using the floating-catalyst chemical vapor deposition (CVD) technique. Acetone, ferrocene, and thiophene served as the sources of carbon, catalyst, and promoter, respectively. By adjusting the amount of thiophene, the sulfur molar ratio in the CVD reactor was varied to study its impact on the morphology and composition of the CNT fibers. Raman and TEM analyses showed that the structural properties of the CNTs, especially the production of single-walled CNTs (SWCNTs) with a high Raman IG/ ID ratio of approximately 23.8, can be finely tuned by altering the sulfur content, which also affects the accumulation of spherical carbonaceous particles. Moreover, it was established that the electrical conductivity of the CNT fibers is significantly influenced by their specific components—SWCNTs, multi-walled CNTs (MWCNTs), and spherical carbonaceous particles. The ratios of these components can be adjusted by modifying the molar ratios of catalyst and promoter in the precursor mixture. Remarkably, SWCNTs with enhanced crystallinity were found to substantially improve the electrical conductivity of the CNT fibers, despite the presence of numerous spherical carbon impurities.
Abstract
1 Introduction
2 Materials and methods
2.1 Materials
2.2 Synthesis of the CNT fibers
2.3 Characterization
3 Results and discussion
3.1 Morphology and purity of the CNT fibers
3.2 Constituents of the CNT fibers
3.3 Electrical properties of the CNT fibers
4 Conclusion
Acknowledgements
References
