Influence of synthesis parameters on CCVD growth of vertically aligned carbon nanotubes over aluminum substrate

Abstract

In the past two decades, important results have been achieved in the field of carbon nanotube (CNT) research, which revealed that carbon nanotubes have extremely good electrical and mechanical properties The range of applications widens more, if CNTs form a forest-like, vertically aligned structure (VACNT) Although, VACNT-conductive substrate structure could be very advantageous for various applications, to produce proper system without barrier films i.e. with good electrical contact is still a challenge. The aim of the current work is to develop a cheap and easy method for growing carbon nanotubes forests on conductive substrate with the CCVD (Catalytic Chemical Vapor Deposition) technique at 640 °C. The applied catalyst contained Fe and Co and was deposited via dip coating onto an aluminum substrate. In order to control the height of CNT forest several parameters were varied during the both catalyst layer fabrication (e.g. ink concentration, ink composition, dipping speed) and the CCVD synthesis (e.g. gas feeds, reaction time). As-prepared CNT forests were investigated with various methods such as scanning electron microscopy, Raman spectroscopy, and cyclic voltammetry. With such an easy process it was possible to tune both the height and the quality of carbon nanotube forests.

Carbon Nanotube‐Reinforced Aluminum Matrix Composites

“…Secondary operations were also performed on CVD-based composites to improve the homogeneity and density of the reinforcements. [103] Initially, several researchers emphasized on the fabrication of CNT/polymer composites using CVD route and reported tremendous strengthening effect in the composite. [104] Nonetheless, the results were not promising in CNT/MMCs due to inhomogeneous dispersion of CNTs in the metal matrix.…”

Flexible Graphene‐, Graphene‐Oxide‐, and Carbon‐Nanotube‐Based Supercapacitors and Batteries

“…CVD growth of CNTs also has the advantage of large‐scale production and potential vertically aligned CNT growth . Many parameters influence the CNTs’ synthesis, such as catalysts (Fe, Ni, and Co), growth temperature, and concentration of gas …”

“…b) Reproduced with permission . Copyright 2001, Elsevier Science Ltd. c) Reproduced under the terms of the CC‐BY Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/) . Copyright 2017, The Authors, published by Springer Nature.…”

Facile growth of carbon nanotubes using microwave ovens: the emerging application of highly efficient domestic plasma reactors

“…The MWNTs produced by the CVD methods typically show I D /I G ratios in the range of 0.64-1.07. [60][61][62][63] On the other hand, the MWNTs produced by the microwave methods show a relatively wide-range distribution of the I D /I G ratios from 0.15 to 1.1, according to Raman spectroscopic characterization. 35,[37][38][39][40][41]47,58,64 The values of the I D /I G ratio of the microwavegrown MWNTs are similar to, or smaller than, those of the CVD-grown MWNTs, indicating that the quality of the microwave-grown MWNTs is comparable to that of the CVD ones.…”