High-quality single-walled carbon nanotubes synthesis by hot filament CVD on Ru nanoparticle catalyst

Bouanis, Fatima Zahra; Baraton, Laurent; Huc, Vincent; Pribat, Didier; Cojocaru, Costel Sorin

doi:10.1016/j.tsf.2011.01.326

Cited by 17 publications

(12 citation statements)

References 29 publications

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“…Each of the five bimetallic catalyst systems have been tested for SWCNT growth using the d-HFCVD process previously described. [27] The presence of SWCNTs grown on the wafer surfaces in relatively large quantity is sustained through a SEM study and is an indication of the good efficiency of this new catalyst family for the growth of SWCNTs (see Fig. 8a and 8d and Fig.…”

Section: Swcnt Growthmentioning

confidence: 80%

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New method for the growth of single-walled carbon nanotubes from bimetallic nanoalloy catalysts based on Prussian blue analog precursors

Castan

Forel

Catala

et al. 2017

Carbon

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Catalyst engineering is a key point for selective growth of single-walled carbon nanotubes (SWCNT) with chemical vapor deposition (CVD). Here, we develop a new general synthesis method able to produce a wide range of homogenous bimetallic catalyst nanoparticles with controlled stoichiometry and sizes. The basics of this catalyst synthesis is to use preformed stoichiometric bimetallic Prussian blue analog (PBA) nanoparticles. Catalyst nanoparticles are then prepared in-situ in a hot filament CVD reactor with subsequent high temperature treatment in reducing atmosphere prior to SWCNT growth. The capabilities of the synthesis route are demonstrated by testing five PBA systems involving various transition metals. Transmission electron microscopy (TEM), scanning TEM and energy dispersive X-ray spectroscopy (STEM-EDX), and in-situ X-ray photoelectron spectroscopy (XPS) measurements are used to finely follow the size and composition of the catalyst at each step of the process. Each system yields small size catalysts with a narrow distribution, which act as efficient catalysts for SWCNT growth with a good yield and small diameter distribution. The versatility of the PBA family paves a new way for a fine tuning of the catalyst properties monitored by the metal involved in the PBA, and for opening routes to more selective SWCNT synthesis.

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Section: Swcnt Growthmentioning

confidence: 80%

“…The global multistep process leading to the growth of SWCNTs [27], [28] from PBA precursors is shown in Fig. 2 Details on the various steps of this process are provided in the following paragraphs.…”

Section: Methodsmentioning

confidence: 99%

New method for the growth of single-walled carbon nanotubes from bimetallic nanoalloy catalysts based on Prussian blue analog precursors

Castan

Forel

Catala

et al. 2017

Carbon

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“…In HFCVD, a relatively inexpensive substrate can be used to produce CNT. Bouanis et al [41] fabricated SWCNTs by the HFCVD method. They used Ru nanoparticle as a catalyst and methane gas as a carbon source heated by a 2 W filament.…”

Section: Carbon Nanotubesmentioning

confidence: 99%

Carbon nanotubes part I: preparation of a novel and versatile drug-delivery vehicle

Karimi

Solati

Amiri

et al. 2015

Expert Opinion on Drug Delivery

101

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Introduction It is 23 years since carbon allotrope known as carbon nanotubes (CNT) was discovered by Iijima, who described them as “rolled graphite sheets inserted into each other”. Since then, CNTs have been studied in nanoelectronic devices. However, CNTs also possess the versatility to act as drug- and gene-delivery vehicles. Areas covered This review covers the synthesis, purification and functionalization of CNTs. Arc discharge, laser ablation and chemical vapor deposition are the principle synthesis methods. Non-covalent functionalization relies on attachment of biomolecules by coating the CNT with surfactants, synthetic polymers and biopolymers. Covalent functionalization often involves the initial introduction of carboxylic acids or amine groups, diazonium addition, 1,3-dipolar cycloaddition or reductive alkylation. The aim is to produce functional groups to attach the active cargo. Expert opinion In this review, the feasibility of CNT being used as a drug-delivery vehicle is explored. The molecular composition of CNT is extremely hydrophobic and highly aggregation-prone. Therefore, most of the efforts towards drug delivery has centered on chemical functionalization, which is usually divided in two categories; non-covalent and covalent. The biomedical applications of CNT are growing apace, and new drug-delivery technologies play a major role in these efforts.

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“…24. 159 Self assembled monolayers of Ru tetraphenyl porphyrins (RuTPP) were used as catalyst on the SiO 2 /Si(100) growth substrates pre-functionalized by silanization to form a pyridine terminated molecular monolayer by HFCVD (hot lament CVD). Recently, nanoparticles from dodecatriruthenium dodecacarbonyl Ru 3 (CO) 12 65 were also explored for ruthenium deposition on SiO 2 /Si(001) substrates at 473 K with and without an overpressure of CO by Liao et al 160 A highly smooth thin lm is obtained by carbon monoxide addition during growth.…”

Section: (D) Miscellaneous Ruthenium Cvd Precursorsmentioning

confidence: 99%

Ruthenium complexes as precursors for chemical vapor-deposition (CVD)

et al. 2014

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High-quality single-walled carbon nanotubes synthesis by hot filament CVD on Ru nanoparticle catalyst

Cited by 17 publications

References 29 publications

New method for the growth of single-walled carbon nanotubes from bimetallic nanoalloy catalysts based on Prussian blue analog precursors

New method for the growth of single-walled carbon nanotubes from bimetallic nanoalloy catalysts based on Prussian blue analog precursors

Carbon nanotubes part I: preparation of a novel and versatile drug-delivery vehicle

Ruthenium complexes as precursors for chemical vapor-deposition (CVD)

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