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Catalyst‐mediated enhancement of carbon nanotube textiles by laser irradiation: Nanoparticle sweating and bundle alignment

Published version
Peer-reviewed

Type

Article

Change log

Authors

Gspann, TS 
Tan, W 
Kloza, PA 
Bulmer, JS 

Abstract

jats:pThe photonic post-processing of suspended carbon nanotube (CNT) ribbons made by floating catalyst chemical vapor deposition (FC-CVD) results in selective sorting of the carbon nanotubes present. Defective, thermally non-conductive or unconnected CNTs are burned away, in some cases leaving behind a highly crystalline (as indicated by the Raman G:D ratio), highly conductive network. However, the improvement in crystallinity does not always occur but is dependent on sample composition. Here, we report on fundamental features, which are observed for all samples. Pulse irradiation (not only by laser but also white light camera flashes, as well as thermal processes such as Joule heating) lead to (1) the sweating-out of catalyst nanoparticles resulting in molten catalyst beads of up to several hundreds of nanometres in diameter on the textile surface and (2) a significant improvement in CNT bundle alignment. The behavior of the catalyst beads is material dependent. Here, we show the underlying mechanisms of the photonic post-treatment by modelling the macro- and microstructural changes of the CNT network and show that it is mainly the amount of residual catalyst which determines how much energy these materials can withstand before their complete decomposition.</jats:p>

Description

Keywords

carbon nanotube, CNT, catalyst, network, textiles, photonic processing, thermal processing, alignment, microstructure

Journal Title

Catalysts

Conference Name

Journal ISSN

2073-4344
2073-4344

Volume Title

11

Publisher

MDPI AG
Sponsorship
Engineering and Physical Sciences Research Council (EP/M02086X/1)
Engineering and Physical Sciences Research Council (EP/L015552/1)
European Commission Horizon 2020 (H2020) Future and Emerging Technologies (FET) (881603)
Engineering and Physical Sciences Research Council (2280508)