CVD growth of carbon nanotubes directly on nickel substrate

Du, Chunsheng; Pan, Ning

doi:10.1016/j.matlet.2005.01.043

Cited by 75 publications

(43 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been previously reported that the grain boundaries on bulk metals act as nucleation sites [3,47] due to change in local topography and/or effect of local impurities [69]. Also, grain boundaries provide a fast path for mass transport [39]. The enhanced mass transport into faceted nickel foil accelerated the formation of crystallites, which resulted in the increase in carbon yield.…”

Section: Mechanism Of Cnf Synthesismentioning

confidence: 99%

“…However, CNF/CNT synthesis on bulk metal substrates is challenging because the exact dimensions of the catalyst cannot be controlled, and as a result high levels of amorphous carbon may be formed. Several investigators have reported synthesis of CNF/CNT on bulk stainless steel substrates [30][31][32][33][34][35]; however, there are relatively few reports of CNF synthesis on bulk nickel metal substrates such as foams [36][37][38], screens/grids [39], and foils [40][41][42][43]. Pretreatment of the bulk metal has been studied for its effects on CNF/CNT growth.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Karwa

Davis

Tatarchuk

2012

Journal of Nanotechnology

View full text Add to dashboard Cite

This study focuses on the process of optimization for carbon nanofiber synthesis at the exterior and the interior of 3-dimensional sintered nickel microfibrous networks. Synthesis of carbon nanofibers (CNF) by catalytic decomposition of acetylene (ethyne) was conducted at atmospheric pressure and short reaction times (10 min). Two factors evaluated during the study were (a) CNF quality (observed by SEM and Raman spectroscopy) and (b) rate of reaction (gravimetrically measured carbon yield). Independent optimization variables included redox faceting pretreatment of nickel, synthesis temperature, and gas composition. Faceting resulted in an 8-fold increase in the carbon yield compared to an untreated substrate. Synthesis with varying levels of hydrogen maximized the carbon yield (9.31 mg C/cm 2 catalyst). The quality of CNF was enhanced via a reduction in amorphous carbon that resulted from the addition of 20% ammonia. Optimized growth conditions that led to high rates of CNF deposition preferentially deposited this carbon at the exterior layer of the nickel microfibrous networks (570 • C, 78% H 2 , 20% NH 3 , 2% C 2 H 2 , faceted Ni.). CNF growth within the 3-dimensional nickel networks was accomplished at the conditions selected to lower the gravimetric reaction rate (470 • C, 10% H 2 , 88% N 2 , 2% C 2 H 2 , nonfaceted Ni).

show abstract

Section: Mechanism Of Cnf Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Karwa

Davis

Tatarchuk

2012

Journal of Nanotechnology

View full text Add to dashboard Cite

show abstract

“…However, it is known that Ni can be used as a catalyst for the growth of CNTs. [8,19,32] Furthermore, Du and Pan [32] grew multiwalled CNTs by directly using Ni grids as catalytic active substrates. When analyzing the samples obtained with both approaches, it was observed that many of the SWCNTs had one of their ends on the Ni metal grid (Fig.…”

Section: Synthesis Of Cnts Directly From the Ni Grid: Control Experimmentioning

confidence: 99%

Aerosol Catalyst Particles for Substrate CVD Synthesis of Single‐Walled Carbon Nanotubes

Queipo¹,

Nasibulin²,

Jiang³

et al. 2006

Chemical Vapor Deposition

View full text Add to dashboard Cite

Individual single-walled carbon nanotubes (SWCNTs) were grown by a CVD method on thin SiO 2 films using iron and carbon monoxide as the catalyst material and the carbon source, respectively. Catalyst particles were produced via physical vapor deposition (PVD) as an aerosol using a hot-wire particle generator and then deposited by two different approaches. Particles collected onto the substrates by diffusion inside the reactor led to the production of large diameter SWCNTs (∼3-6 nm) with lengths up to 30 lm. An outside deposition, via electrostatic precipitator, resulted in the synthesis of longer SWCNTs (≥ 50 lm) with smaller diameters (< 2 nm).

show abstract

“…The most frequently used catalysts are transition metals, the primary catalyst of iron (Fe) [9], cobalt (Co) [9,10], nickel (Ni) [11,12] or dual transition metal Fe-Co on supporting material such zeolite [13]. In the case of the abundance and simplicity to obtain the catalyst, Fe catalyst can be a good choice because its uses in CVD method would produce higher yield compared to Co catalyst uses in producing CNT.…”

Section: Introductionmentioning

confidence: 99%

Bifunctional catalyst of graphite-encapsulated iron compound nanoparticle for magnetic carbon nanotubes growth by chemical vapor deposition

Saraswati¹,

Prasiwi²,

Masykur³

et al. 2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. The carbon nanotube has widely taken great attractive in carbon nanomaterial research and application. One of its preparation methods is catalytic chemical vapor deposition (CCVD) using catalyst i.e. iron, nickel, etc. Generally, except the catalyst, carbon source gasses as the precursor are still required. Here, we report the use of the bifunctional material of Fe3O4/C which has an incorporated core/shell structures of carbon-encapsulated iron compound nanoparticles. The bifunctional catalyst was prepared by submerged arc discharge that simply performed using carbon and carbon/iron oxide electrodes in ethanol 50%. The prepared material was then used as a catalyst in thermal chemical vapor deposition at 800 o C flown with ethanol vapor as the primer carbon source in a low-pressure condition. This catalyst might play a dual role as a catalyst and secondary carbon source for growing carbon nanotubes at the time. The synthesized products were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. The successful formation of carbon nanotubes was assigned by the shifted X-ray diffracted peak of carbon C(002), the iron oxides of Fe3O4 and -Fe2O3, and the other peaks which were highly considered to the other carbon allotropes with sp 2 hybridization structures. The other assignment was studied by electron microscopy which successfully observed the presence of single-wall carbon nanotubes. In addition, the as-prepared carbon nanotubes have a magnetic property which was induced by the remaining of metal catalyst inside the CNT.

show abstract

CVD growth of carbon nanotubes directly on nickel substrate

Cited by 75 publications

References 26 publications

Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Carbon Nanofiber Synthesis within 3-Dimensional Sintered Nickel Microfibrous Matrices: Optimization of Synthesis Conditions

Aerosol Catalyst Particles for Substrate CVD Synthesis of Single‐Walled Carbon Nanotubes

Bifunctional catalyst of graphite-encapsulated iron compound nanoparticle for magnetic carbon nanotubes growth by chemical vapor deposition

Contact Info

Product

Resources

About