Diameter control of vertically aligned carbon nanotubes using CoFe2O4 nanoparticle Langmuir–Blodgett films
| Autor: | Taiga Sato, Shuhei Tamiya, Masahito Kushida |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Number density Materials science Physics and Astronomy (miscellaneous) Diameter control Catalyst support General Engineering Mixing (process engineering) General Physics and Astronomy Nanoparticle 02 engineering and technology Carbon nanotube 021001 nanoscience & nanotechnology 01 natural sciences Langmuir–Blodgett film law.invention Catalysis Chemical engineering law 0103 physical sciences 0210 nano-technology |
| Zdroj: | Japanese Journal of Applied Physics. 57:03EG15 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.7567/jjap.57.03eg15 |
| Popis: | Vertically aligned carbon nanotubes (VA-CNTs) are suggested for utilization as a new catalyst support of polymer electrolyte fuel cells (PEFCs). The independent control of the diameter and number density of VA-CNTs is essential for application in PEFCs. As the catalyst for VA-CNT growth, we fabricated CoFe2O4 nanoparticle (NP) films using the Langmuir–Blodgett (LB) technique. Using the LB technique, we were able to separately control the diameter and number density of VA-CNTs. The number density of VA-CNTs was changed by mixing with the filler moleculer, palmitic acid (C16). The VA-CNT diameter was changed by the adjusting the CoFe2O4 NP diameter. However, the heat-induced aggregation of CoFe2O4 NPs occurred in thermal chemical vapor deposition to synthesize VA-CNTs. Therefore, we examined how to minimize the effect of heat-induced aggregation of CoFe2O4 NPs. As a result, selection of the appropriate number density and diameter of CoFe2O4 NPs was found to be important for the control of VA-CNT diameter. |
| Databáze: | OpenAIRE |
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