New laser ablation chamber for producing carbon nanomaterials using excimer laser

Bota, P. M.; Dorobantu, Dorel; Boerasu, I.; Bojin, Dionezie; Enăchescu, Marius

doi:10.1179/1433075x14y.0000000202

Cited by 13 publications

(7 citation statements)

References 28 publications

(56 reference statements)

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“…The target was prepared by following a recipe developed by Enachescu's group [28,31,32]. This recipe involves the mixing of graphite cement (GC 8010-B from Metal Forming Lubricants) with metal catalysts powder (Sigma Aldrich).…”

Section: Original Target Preparation Methodsmentioning

confidence: 99%

“…Other disadvantage of such reactor is the inert gas is not directed to carry the products from target to substrate, but only provides an inert atmosphere inside. Figure 5 presents a cut-away side view of the novel experimental set-up developed and used in our research for the laser ablation of the targets [28]. The laser ablation chamber consists of a quartz tube, 50 mm in diameter and 1260 mm long, inserted into an oven.…”

Section: Different Types Of Reactors For Laser Ablation Experimentsmentioning

confidence: 99%

“…Kataura et al have shown that increasing the furnace temperature and the time spent by the ablation products at this elevated temperature increases the SWCNTs production yield [30]. (ii) The cold finger is longer (260 mm) with a larger surface than the previous one [28,31], increasing the temperature gradient over its length and improving the capture of the product. A comparison of them is displayed in Figure 7, from where we can see that ratio of the length of the new cold finger versus older designs is over 4.5:1.…”

Section: Our New Chamber Designmentioning

confidence: 99%

See 2 more Smart Citations

High-Quality Carbon Nanomaterials Synthesized by Excimer Laser Ablation

Moise¹,

Enăchescu²

2016

Applications of Laser Ablation - Thin Film Deposition, Nanomaterial Synthesis and Surface Modification

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Due to their special physical and chemical properties and potential applications from hydrogen storage to medical implantation, the carbon-based nanomaterials are in the frame of attention for many research groups all over the world. As synthesis techniques, we highlight arc discharge, chemical vapor deposition (CVD) and laser ablation. Even an expensive technique, laser ablation is suitable for single-wall carbon nanotubes (SWCNTs) synthesis, providing the highest yield of over 70%, while arc discharge yield is about 30% and CVD is about 42%. The most common investigation methods for carbon nanomaterials are micro-Raman spectroscopy, thermo-gravimetric analysis (TGA) and morphological and topographic studies done by atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HR-TEM). We also emphasize in this work that by involving a home-designed reactor, we successfully synthesized SWCNTs, carbon nano-onions (CNOs) as well as graphene in the same reactor. Tuning the experimental parameters, we switch the end type of nanomaterials. We have done comprehensive studies regarding the carbon nanomaterials synthesis.

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Section: Original Target Preparation Methodsmentioning

confidence: 99%

Section: Different Types Of Reactors For Laser Ablation Experimentsmentioning

confidence: 99%

Section: Our New Chamber Designmentioning

confidence: 99%

See 1 more Smart Citation

High-Quality Carbon Nanomaterials Synthesized by Excimer Laser Ablation

Moise¹,

Enăchescu²

2016

Applications of Laser Ablation - Thin Film Deposition, Nanomaterial Synthesis and Surface Modification

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“…The laser ablation experiment was carried out in a customdesigned installation depicted in Figure 1 [22,24].…”

Section: Methodsmentioning

confidence: 99%

Krypton Gas for High Quality Single Wall Carbon Nanotubes Synthesis by KrF Excimer Laser Ablation

Al-Zanganawee

Katona

Moïse

et al. 2015

Journal of Nanomaterials

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We report for the first time the production of single wall carbon nanotubes (SWCNTs) by KrF excimer laser ablation method under the krypton gas atmosphere. For the ablation experiment 450 mJ energy and 30 Hz repetition rate KrF excimer laser was used, and the target was prepared with the following composition: 0.6% Ni, 0.6% Co, and 98.8% C (atomic percentage). The ablation product was characterized by confocal Raman microspectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The SWCNTs obtained are a mixture of semiconducting and metallic types with narrow diameters distribution of 1.26 to 1.49 nm, are micrometers long, and contain low amount of graphite and amorphous carbon.

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“…[1,10,11] The laser beam coming from the left side of the installation passes through a quartz window entering into a quartz tube and hits the target producing ablation material. Then the inert gas which enters from the left-up side of the installation travels through the 1260 mm long quartz tube and 60 mm diameter, caring the ablation product to the cold finger where it will be deposited.In this study we varied the t h A R A P r o c e e d i n g s ablation gas types while the other parameters: laser type, laser energy, pulse repetition rate, oven temperature, gas pressure, gas flow rate, and ablation time remained constant ( Laser ablation parameters…”

Section: Methodsmentioning

confidence: 99%

KrF excimer laser ablation in helium yields the highest amount of SWCNTs over other inert gases

Moïse¹,

Katona²,

Dinescu³

et al. 2015

Proceedings of the 39th ARA Congress

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Abstract:The single-wall carbon nanotubes (SWCNTs) were synthesized using the equipment, method and experimental conditions described in [1]. Starting from the results shown in [2] and [3] we studied the influence of inert carrier gas over ablated mass, collected material, conducting character of SWCNTs and diameter distribution of SWCNTs. In our study KrF 248nm excimer laser was used instead of Nd:YAG (532nm) in [2] and four ablation gases: argon, nitrogen, neon and helium were involved. This kind of study, performed in our experimental conditions, was not reported so far. The ablated products were characterized using Raman spectroscopy and thermogravimetric analysis. We observed linear decrease of ablated mass with the increase of carrier gas molecular mass. Also the collected mass follows the same trend. TGA allowed us to calculate the mass of SWCNTs contained in the soot and the highest value was obtained in helium, 10 times more than in argon. Also, it was found the thermal conductivity of the carrier gas has a strong influence upon ablated mass and product deposition. The RBM and G Raman bands analysis have shown no influence of carries gas over the SWCNTs diameters distribution, respectively semiconducting character of SWCNTs, in all cases semiconducting SWCNTs being obtained. Our work concludes that helium is the best ablation gas, being 2 times more expensive than nitrogen but producing 8 times more SWCNTs.

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New laser ablation chamber for producing carbon nanomaterials using excimer laser

Cited by 13 publications

References 28 publications

High-Quality Carbon Nanomaterials Synthesized by Excimer Laser Ablation

High-Quality Carbon Nanomaterials Synthesized by Excimer Laser Ablation

Krypton Gas for High Quality Single Wall Carbon Nanotubes Synthesis by KrF Excimer Laser Ablation

KrF excimer laser ablation in helium yields the highest amount of SWCNTs over other inert gases

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