| Autor: |
Melkhanova, S., Haluska, M., Hübner, R., Gemming, S., Krause, M. |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
XXXIstInternational Winterschool on Electronic Properties of Novel Materials, 04.-11.03.2017, Kirchberg, Österreich |
| Popis: |
Predefined catalysts have been recently successfully employed for diameter- and chirality-selective CVD growth of single-walled carbon nanotubes (SWCNTs).[1-3] They simplify the exhausting optimization of parameters for in situ catalyst formation and ensure a very good control of catalyst properties. Using C:Ni nanocomposite templates (NCTs) as catalyst precursors, SWCNTs with a selective, monomodal diameter distribution were obtained. More than the half of the SWCNTs had a diameter of (1.36±0.10) nm.[3] While the preparation of NCTs is well defined and controlled, the activation of the NPs for nanotube synthesis by CVD is a critical step that is still not fully understood. Element-resolved scanning and high-resolution transmission electron microscopy and Raman spectroscopy were used to clarify the microstructure of C:Ni NCTs in the different stages of the SWCNT growth. These studies reveal a distinct change of the NCT microstructure by conserving the initial nanocomposite morphology to a very large extend. [1] F. Yang et al., Nature 510, 522 (2014); [2] H. An et al., Nanoscale 8, 14523 (2016); [3] S. Melkhanova et al., Nanoscale 8, 14888 (2016) |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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