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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Influence of catalyst particles on multi-walled carbon nanotubes morphology and structure

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Silva, Amanda Araujo [1] ; Pinheiro, Romario Araujo [1] ; Trava-Airoldi, Vladimir Jesus [1] ; Corat, Evaldo Jose [1]
Total Authors: 4
[1] Natl Inst Space Res, 1758 Astronautas Ave, BR-12227010 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES; v. 26, n. 5, p. 315-323, 2018.
Web of Science Citations: 1

Multi-walled carbon nanotubes (MWCNTs) have been successfully grown by Chemical Vapor Deposition (CVD) method. Elucidating the key characteristics of catalyst sources that affect carbon nanotubes growth is of great importance for improving and control MWCNTs morphology and structure. In this work we present a systematically study of CVD parameters, such as catalyst source, substrate morphology and temperature and how it affects carbon nanotubes synthesis. The novelty of this work lies on the catalyst composition. Two specific catalyst sources were analyzed: (i) Fe2Co and (ii) Fe2Co with ferrocene. Cyclic Voltammetry results confirmed the presence of Fe2+ in the Fe2Co with ferrocene solution. X-Ray Diffraction analysis confirmed the presence of iron particles on the substrate surface after its submission to growth conditions. Raman results suggested an improvement in carbon nanotubes crystalline quality catalyzed by Fe2Co with ferrocene. For tridimensional substrates such as fibers, the Fe2Co with ferrocene provided aligned CNTs with lower defects density noticed in Raman spectra and SEM micrographs. Finally, we corroborated the Fe2+ encapsulation relation with the growth mechanism and MWCNTs formation. (AU)

FAPESP's process: 12/15857-1 - Scientific studies and innovation application on CVD diamond, DLC and carbon nanostructures obtained by chemical vapor deposition technique
Grantee:Vladimir Jesus Trava-Airoldi
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/02960-7 - Optimization study of large electrochemical active area of nanocomposites VACNT-GO and its application in capacitive deionization
Grantee:Amanda Araujo Silva
Support type: Scholarships in Brazil - Doctorate (Direct)