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Ding, Feng
IBS - Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Theoretical methods development for materials studies.
  • The formation mechanism of various carbon materials, from fullerene to carbon nanotube and graphene.
  • Kinetics and thermodynamics of materials growth and etching.
  • The structure, properties and fundamentals of nanomaterials.
  • The experimental synthesis of carbon nanotubes.

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Nucleation of Single-Wall Carbon Nanotubes from Faceted Pt Catalyst Particles Revealed by in Situ Transmission Electron Microscopy

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Title
Nucleation of Single-Wall Carbon Nanotubes from Faceted Pt Catalyst Particles Revealed by in Situ Transmission Electron Microscopy
Author
Ma, RuixueQiu, LuZhang, LiliTang, Dai-MingWang, YangZhang, BingsenDing, FengLiu, ChangCheng, Hui-Ming
Issue Date
2022-10
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.16, no.10, pp.16574 - 16583
Abstract
Revealing the nucleation and growth mechanism of single-wall carbon nanotubes (SWCNTs) from faceted solid catalysts is crucial to the control of their structure and properties. However, due to the small size and complex growth environment, the early stages and dynamic process of SWCNT nucleation have rarely been directly revealed, especially under atmospheric conditions. Here, we report the atomic-resolved nucleation of SWCNTs from the faces of truncated octahedral Pt catalysts under atmospheric pressure using a transmission electron microscope equipped with a gas-cell. It was found that the graphene layers were initially formed preferentially on specialIntscript surfaces, which then joined together to form an annular belt and a hemispherical cap, followed by the elongation of the SWCNT. Based on the observations, an annular belt assembly nucleation model and a possible chirality control mechanism are proposed for SWCNTs grown from well -faceted Pt catalysts, which provides useful guidance for the controlled synthesis of SWCNTs by catalyst design.
URI
https://scholarworks.unist.ac.kr/handle/201301/60044
DOI
10.1021/acsnano.2c06012
ISSN
1936-0851
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