Aligned carbon nanotubes grown on alumina and quartz substrates by a simple thermal CVD process

Terrado, E.; Redrado, Marta; Muñoz, Edgar; Maser, W.K.; Benito, Ana M.; Martínez, María Teresa

doi:10.1016/j.diamond.2005.10.071

Cited by 34 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…39 For MWCNTs synthesized over alumina-supported catalysts, I G /I D is always very low, indicating that, regardless of the growth conditions, their crystalline quality is quite scarce, in agreement with literature reports. 37 Actually, TEM analysis reveals that tubes, constituted by undulated graphitic sheets (Fig. 7(i)), are twisted and/or bended ( Fig.…”

Section: Morphology Purity Degree and Crystalline Qualitymentioning

confidence: 99%

Growth and Analysis of C Nanotubes on Ceramic Polymer-Additives

Santangelo

Piperopoulos²,

Lanza³

et al. 2012

j. nanosci. nanotech.

View full text Add to dashboard Cite

C nanotubes are synthesized by catalytic route on ceramic supports (Al2O3, MgO and CaO), usually utilized for polymer reinforcing/flame-retardancy, aiming at nanotube-based hybrid preparation. Chemical vapor deposition is carried out in i-C4H10+H2 atmosphere over 17 wt% Fe-catalysts upon different conditions. In order to clarify the influence of support material, calcination (450 degrees C or 750 degrees C) and reduction temperature (500 degrees C or 600 degrees C) of the catalysts, and synthesis temperature (600 degrees C or 700 degrees C), catalysts utilized and nanotubes obtained are systematically investigated by the use of several analysis techniques (electron microscopy, X-ray diffraction, thermo-gravimetry and Raman spectroscopy). The results obtained show that, in the considered range of variation, support material is the most influential parameter. The most catalytically active alumina supports allow achieving higher yields, but involve larger metallic inclusions and lower crystalline quality. Remaining supports behave oppositely. The reasons for such differences are discussed in the light of the current assessments on the nanotube growth and the results obtained are compared with those available in literature for similar catalysts.

show abstract

Section: Morphology Purity Degree and Crystalline Qualitymentioning

confidence: 99%

Growth and Analysis of C Nanotubes on Ceramic Polymer-Additives

Santangelo

Piperopoulos²,

Lanza³

et al. 2012

j. nanosci. nanotech.

View full text Add to dashboard Cite

show abstract

“…In the case of chemical methods for catalyst particle production, the chemistry of the catalyst solution is crucial for determining the size of the nanoparticles, whereas their distribution is mainly determined by the deposition technique, for example spin [36] or dip [37] coating. The most common solutions consist of metal salts diluted in alcoholic solutions; however, stable solutions by using surfactants [38] or applying a sol–gel process [39] can be also used. The main disadvantage of the chemical method is the difficulty of optimizing the catalyst solution.…”

Section: Reviewmentioning

confidence: 99%

Functionalization of vertically aligned carbon nanotubes

Hooijdonk¹,

Bittencourt²,

Snyders³

et al. 2013

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

SummaryThis review focuses and summarizes recent studies on the functionalization of carbon nanotubes oriented perpendicularly to their substrate, so-called vertically aligned carbon nanotubes (VA-CNTs). The intrinsic properties of individual nanotubes make the VA-CNTs ideal candidates for integration in a wide range of devices, and many potential applications have been envisaged. These applications can benefit from the unidirectional alignment of the nanotubes, the large surface area, the high carbon purity, the outstanding electrical conductivity, and the uniformly long length. However, practical uses of VA-CNTs are limited by their surface characteristics, which must be often modified in order to meet the specificity of each particular application. The proposed approaches are based on the chemical modifications of the surface by functionalization (grafting of functional chemical groups, decoration with metal particles or wrapping of polymers) to bring new properties or to improve the interactions between the VA-CNTs and their environment while maintaining the alignment of CNTs.

show abstract

“…Experiment shows the substrate morphology and surface chemistry may play an important role in the final CNTs orientation. The catalyst preparation and the substrate characteristics affect the CNTs growth and morphology [18]. We here show how large diameter MWNTs can alternatively be easily grown from Fe catalyst deposited on quartz substrate.…”

Section: Introductionmentioning

confidence: 95%

Large diameter MWNTs growth on iron-sprayed catalyst by CCVD method under atmospheric pressure

Hosseini

Taleshi

2010

Indian J Phys

View full text Add to dashboard Cite

In this work, we have synthesized large diameter multi-walled carbon nanotubes (MWNTs), by simple catalyst chemical vapor deposition (CCVD). Fe powder was spread on quartz substrate as a catalyst by a simple method and then heated under Ar atmosphere. Carbon's products can be synthesized by the decomposition of ethylene gas and deposition of carbon atoms on the Fe catalyst particles in Ar atmosphere at 930°C. XRD pattern, SEM and TEM images were used to investigate the characteristics, morphology and structure of carbon's products.

show abstract

Aligned carbon nanotubes grown on alumina and quartz substrates by a simple thermal CVD process

Cited by 34 publications

References 26 publications

Growth and Analysis of C Nanotubes on Ceramic Polymer-Additives

Growth and Analysis of C Nanotubes on Ceramic Polymer-Additives

Functionalization of vertically aligned carbon nanotubes

Large diameter MWNTs growth on iron-sprayed catalyst by CCVD method under atmospheric pressure

Contact Info

Product

Resources

About