Early stages of the chemical vapor deposition of pyrolytic carbon investigated by atomic force microscopy

Pfrang, Andreas; Wan, Yong-Zhong; Schimmel, Thomas

doi:10.1016/j.carbon.2009.10.031

Cited by 9 publications

(2 citation statements)

References 9 publications

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“…That is, lower deposition pressure is more likely to reduce the Ra of the droplets, which means the 1·1 kPa deposition owns smaller Ra comparing to the 1·8 kPa deposition in our experiment. Woo, 17 Andreas 29 both suggest that pyrocarbon of high texture grows in an island growth mechanism. The droplets firstly deposit and nucleate at active sites, form isolated islands, then grow at a constant radial growth velocity concentrically around its nucleus point.…”

Section: Resultsmentioning

confidence: 99%

Influence of deposition pressure on texture of pyrolytic graphite during chemical vapour deposition

Zhu

Zhang

Huang

et al. 2015

Materials Science and Technology

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To investigate the influence of deposition pressure on the texture of pyrolytic graphite, a series of experiments were carried out. The pyrolytic graphites were fabricated at 2000°C with propylene as the carbon source and nitrogen as the carrier gas in a system pressure from 1·1 to 1·8 kPa. Results show that lowering the deposition pressure will increase the density and thin the growth cones. The reduce of deposition pressure will also cause an increasing in the degree of graphitisation extracted from X-ray diffraction patterns and the value of ( IG/ ID) in Raman spectra. Therefore, lower deposition pressure is more inclined to yield high texture pyrolytic graphite. Finally, the deposition mechanism was discussed.

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Section: Resultsmentioning

confidence: 99%

Influence of deposition pressure on texture of pyrolytic graphite during chemical vapour deposition

Zhu

Zhang

Huang

et al. 2015

Materials Science and Technology

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“…Allouche et al [23][24][25] reported the deposition of carbon on CNTs, and used the droplet model to interpret the deposited carbon with various morphology like cones and beads. Pfrang et al investigated the carbon nucleation of PyC on planar silicon substrate using atomic force microscopy, but did not describe the details of the nucleation [26]. Smooth deposition of pyrolytic carbon on CNTs was also demonstrated in the preparation of VGCFs [27], implying a different deposition mechanism other than droplet model.…”

Section: Introductionmentioning

confidence: 99%

A layer-by-layer deposition mechanism for producing a pyrolytic carbon coating on carbon nanotubes

Zheng

Sano

Uchiyama

2013

Carbon

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Abstract:Pyrolytic carbon (PyC) was deposited on carbon nanotubes (CNTs) in order to modify them by introducing defects to their surface. The deposition of PyC was carried out at temperature between 800 and 1000ºC using propane as carbon source with or without a hydrogen carrier gas at low pressure of 20 kPa. The structure of PyC coatings was examined using transmission electron microscopy. The PyC coating could be distinguished from the original CNT walls due to the difference of the structure,with the coating showing a less orderly layer structure. When H 2 was introduced during deposition, PyC coating started to form at 900ºC, and the deposition rate increased rapidly with increasing temperature. Without H 2 , PyC coating with a thickness of a few layers could be formed at temperatures between 800-900ºC in 10 min. The outmost layer of the PyC coating showed a structure of rough and curved carbon fragment. A layer-by-layer mechanism is proposed for the deposition consisting of alternating fragment formation (nucleation) and lateral growth to layer.

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The influence of deposition temperature on the microstructure of isotropic pyrocarbon obtained by hot-wall chemical vapor deposition

Zhang

et al. 2011

J Mater Sci

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Early stages of the chemical vapor deposition of pyrolytic carbon investigated by atomic force microscopy

Cited by 9 publications

References 9 publications

Influence of deposition pressure on texture of pyrolytic graphite during chemical vapour deposition

Influence of deposition pressure on texture of pyrolytic graphite during chemical vapour deposition

A layer-by-layer deposition mechanism for producing a pyrolytic carbon coating on carbon nanotubes

The influence of deposition temperature on the microstructure of isotropic pyrocarbon obtained by hot-wall chemical vapor deposition

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