# Atomic Self-reconstruction of Catalyst Dominated Growth Mechanism of Graphite Structures
> Hu Y.

URL kanonis: https://discover.unhas.ac.id/publications/atomic-self-reconstruction-of-catalyst-dominated-growth-mechanism-of-graphite-st
Jurnal / Konferensi: Chemcatchem
Tahun terbit: 2020
DOI: https://doi.org/10.1002/cctc.201902087
ISSN: 18673880
Kuartil SJR: Q1
Citations: 10

## Authors
- Hu Y.

## Abstract
Abstract Understanding the nucleation and growth process of carbon nanotubes (CNTs) is important for guiding their efficient and controllable synthesis in industry. However, the intrinsic mechanism that controls the formation of carbon nanotubes is still controversial. Here, using in‐situ transmission electron microscopy (TEM), we demonstrate the dynamic catalytic growth of multilayered graphite crystallites and single‐walled carbon nanotubes (SWCNTs) from the Co 2 C catalyst nanoparticles (NPs) at the atomic resolution. The dissociative carbon atoms arrive at the nucleation sites on the surface of small and large NPs by the surface and bulk diffusion, respectively. These two different diffusion modes are found to be the essential prerequisite for growing single‐walled carbon nanotubes (SWCNTs) or multilayered graphite crystallites. The small NPs utilize crystal self‐rotation to expose the (111) plane for efficiently capturing carbon atoms, while the large NPs use self‐reshaping on (111) facets to provide atomic steps as active nucleation sites. Density functional theory (DFT) calculations indicate that the observations are in good agreement with the growth mechanism of graphite structures involving the preferential selectivity of crystal facets. Our results may open up the possibility of adjusting the size and crystal orientation of cobalt‐based catalyst particles to efficiently synthesize the SWCNTs with high quality.

## Keywords
- Nucleation
- Carbon nanotube
- Materials science
- Graphite
- Crystallite
- Nanotechnology
- Catalysis
- High-resolution transmission electron microscopy
- Chemical physics
- Chemical engineering
- Nanoparticle
- Carbon fibers
- Crystal (programming language)
- Surface diffusion
- Density functional theory
- Transmission electron microscopy
- Crystal growth
- Crystallography
- Chemistry
- Computational chemistry
- Composite material
- Physical chemistry
- Organic chemistry
- Adsorption
- Composite number
- Computer science
- Programming language
- Metallurgy
- Engineering

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Sumber: Discover Unhas — RIMS Universitas Hasanuddin.
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