How to switch from a tip to base growth mechanism in carbon nanotube growth by catalytic chemical vapour deposition

Dijon, Jean; Szkutnik, Pierre-David; Fournier, A.; Monsabert, Thomas Goislard de; Okuno, Hanako; Quesnel, Etienne; Muffato, V.; Vito, Éric De; Bendiab, Nedjma; Bogner, Agnès; Bernier, Nicolas

doi:10.1016/j.carbon.2010.06.064

Cited by 64 publications

(38 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar finding was reported by A.B. Suriani et al [15], these are known as either "tip-growth or base-growth model" [16]. In the same context, it was observed that Fig.…”

Section: Resultssupporting

confidence: 87%

Structural and Thermal Properties of ACNT by Modified Deposition Method: Growth Time Approach

Shamsudin

Molaei

Asnida

et al. 2012

View full text Add to dashboard Cite

Abstract. The knowledge of fabrication method plays an important role in the preparation of aligned carbon nanotubes (ACNT) from natural hydrocarbon feedstock. Here ACNT were successfully synthesized by two-stage catalytic chemical vapor deposition method using organic oil (camphor oil) as a precursor. Synthesis was carried out at a fixed growth temperature of 800 o C and in different growth time: 10, 20, 30, 40, 50 and 60 minutes. The optimized condition for the growth of ACNT produced a small amount of by-product amorphous carbon and highly uniform crystal structure. The experimental results demonstrated that formation ACNT is also dependent on the growth time. The nanotubes were characterized by field emission scanning electron microscopy and micro-Raman spectroscopy. Thermal properties were evaluated by thermogravimetric analysis.

show abstract

“…Similar finding was reported by A.B. Suriani et al [15], these are known as either "tip-growth or base-growth model" [16]. In the same context, it was observed that Fig.…”

Section: Resultssupporting

confidence: 87%

Structural and Thermal Properties of ACNT by Modified Deposition Method: Growth Time Approach

Shamsudin

Molaei

Asnida

et al. 2012

View full text Add to dashboard Cite

show abstract

“…The authors observed a good agreement between this critical diameter and the average diameter of CNTs formed by different methods as a function of the catalyst nature and synthesis temperature. Dijon et al[391] used a similar approach to compare the probability of two models of nanotube nucleation leading to either base-growth or tip-growth as a function of the particle size and oxidation state of the catalyst.The model developed by Kanzow et al[392] addressed the thermodynamic conditions for a graphene sheet at the surface of a liquid metal/carbon particle to bend and form a fullerene-like cap. From the model, the formation of a cap will be preferred if the available thermal energy exceeds the work of adhesion at the graphene/particle interface and the strain energy associated with the cap formation: the work of adhesion depends on the metal and decreases with the carbon content while the strain energy per unit area decreases with increasing the size of the graphene sheet.…”

mentioning

confidence: 99%

Current understanding of the growth of carbon nanotubes in catalytic chemical vapour deposition

Jourdain

Bichara

2013

Carbon

490

334

View full text Add to dashboard Cite

Due to its higher degree of control and its scalability, catalytic chemical vapour deposition is now the prevailing synthesis method of carbon nanotubes. Catalytic chemical vapour deposition implies the catalytic conversion of a gaseous precursor into a solid material at the surface of reactive particles or of a continuous catalyst film acting as a template for the growing material. Significant progress has been made in the field of nanotube synthesis by this method although nanotube samples still generally suffer from a lack of structural control. This illustrates the fact that numerous aspects of the growth mechanism remain ill-understood. The first part of this review is dedicated to a summary of the general background useful for beginners in the field. This background relates to the carbon precursors, the catalyst nanoparticles, their interaction with carbonaceous compounds and their environment. The second part provides an updated review of the influence of the synthesis parameters on the features of nanotube samples: diameters, chirality, metal/semiconductor ratio, length, defect density and catalyst yield. The third part is devoted to important and still open questions, such as the mechanism of nanotube nucleation and the chiral selectivity, and to the hypotheses currently proposed to answer them

show abstract

“…The presence of iron oxides has also been reported in the case of CNT growth by CCVD [28][29][30][31]. However, such oxide phases are not the catalytic phases in the process we use, where nanoparticles giving rise to CNT growth were shown to be cementite nanoparticles [22].…”

Section: Methodsmentioning

confidence: 52%

Structure in nascent carbon nanotubes revealed by spatially resolved Raman spectroscopy

Landois¹,

Pinault²,

Huard³

et al. 2014

Thin Solid Films

View full text Add to dashboard Cite

Abstract:The understanding of carbon nanotubes (CNT) growth is crucial for the control of their production. In particular, the identification of structural changes of carbon possibly occurring near the catalyst particle in the very early stages of their formation is of high interest. In this study, samples of nascent CNT obtained during nucleation step and samples of vertically aligned CNT obtained during growth step are analysed by combined spatially resolved Raman spectroscopy and X-Ray diffraction measurements. Spatially resolved Raman spectroscopy reveals that iron-based phases and carbon phases are co-localised at the same position, and indicates that sp 2 carbon nucleates preferentially on iron-based particles during this nucleation step. Depth scan Raman spectroscopy analysis, performed on nascent CNT, highlights that carbon structural organisation is significantly changing from defective graphene layers surrounding the iron-based particles at their base up to multi-walled nanotube structures in the upper part of iron-based particles.

show abstract

How to switch from a tip to base growth mechanism in carbon nanotube growth by catalytic chemical vapour deposition

Cited by 64 publications

References 35 publications

Structural and Thermal Properties of ACNT by Modified Deposition Method: Growth Time Approach

Structural and Thermal Properties of ACNT by Modified Deposition Method: Growth Time Approach

Current understanding of the growth of carbon nanotubes in catalytic chemical vapour deposition

Structure in nascent carbon nanotubes revealed by spatially resolved Raman spectroscopy

Contact Info

Product

Resources

About