Formation of Single-Wall Carbon Nanotube Superbundles

Gennett, Thomas; Dillon, Anne C.; Alleman, J.; Jones, K. M.; Hasoon, Falah S.; Heben, Michael J.

doi:10.1021/cm9907108

Cited by 19 publications

(16 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6][7][8][9] Previous works on disentanglement and alignment of CNTs used a special mechanical trick and the incorporation of foreign materials. Moreover, it is well-known that, for MWNTs, it is difficult to fabricate the buckypaper using a conventional filtration process without severe oxidation and shortening of the nanotubes because of their large diameter and entangled structure of MWNTs.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen-Bond-Driven Assembly of Thin Multiwalled Carbon Nanotubes

et al. 2008

View full text Add to dashboard Cite

We report on the formation of the assembled bundle structure of thin multiwalled carbon nanotubes (t-MWNTs) modified with hydroxyl groups, which was assisted by the intertube hydrogen bonding interaction. To achieve this, the t-MWNTs were first functionalized with hydroxide (t-MWNT-OH) by reflux in hydrogen peroxide. For the comparison, the carboxyl-modified t-MWNTs (t-MWNTs-COOH) were prepared by nitric acid treatment as a control sample. After filtration of a functionalized t-MWNT solution, the flexible t-MWNT film was obtained from the t-MWNTs-OH, whereas the t-MWNTs-COOH formed a cracked film. From electron microscope images, it was found that the t-MWNTs-OH can assemble into bundle structures upon densification of the carbon nanotube suspension, while the t-MWNTs-COOH existed in an entangled state within the film. The assembly of the t-MWNTs-OH induced by the intertube hydrogen bonding was demonstrated by observation of the upshift and sharpening of the G band in the Raman spectra and enhanced hydrogen bonds in Fourier transform infrared spectra of nanotube films.

show abstract

Section: Introductionmentioning

confidence: 99%

Hydrogen-Bond-Driven Assembly of Thin Multiwalled Carbon Nanotubes

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Others have found that inclusion of certain inorganic chemicals in the anode, for example, cobalt, produces single walled nanotubes [18][19][20][21][22] a result confirmed by US 63 • Naphthalene also affects the product distribution in experiments with cobalt additives. …”

Section: Resultsmentioning

confidence: 86%

Stereochemistry of carbon nanotubes for electronic applications

et al. 2001

View full text Add to dashboard Cite

Results are presented from studies to prepare carbon nanotubes of single geometry.Carbon nanotubes of certain stereochemistry have been found to be conductive. Others have been found to be excellent transistors, and together nanoelectronic devices have already been formed from them including logic gate circuits. Two synthetic approaches have been tried, namely plasma arcing in the presence of additives and ball milling. In plasma arcing, cathode deposits are altered by the presence of naphthalene in the feed material The mixture of nanotubes so formed has a larger average void size than that formed in the absence of naphthalene. The results support proposed mechanisms of nanotube formation which involve growth by incorporation of carbon atoms into open tubes. They also show that naphthalene can be directly incorporated into fullerene black and thereby increase the number of hexagonal sheet structures in the carbon deposit. Work so far in ball milling has been confined to studies of the destruction of graphite crystalline phases.

show abstract

“…A variety of laser vaporization synthetic procedures for the production of single-wall carbon nanotubes (SWNTs) have been described in the literature [4][5][6][7][8][9][10][11][12]. The resultant materials are a heterogeneous mixture of SWNTs, carbonaceous soots and catalyst metals whose composition is dependent on experimental conditions.…”

Section: Laser Synthesis Of Swnt-supported Catalystsmentioning

confidence: 99%

“…[9][10][11][12][13][14] For the syntheses with high-refractory metals which require higher temperatures, 1400-1800 o C, a previously described apparatus that incorporates a 5 kW self-tuning Radyne Induction heater is utilized. [11] Similar to the previously published procedures, a resultant web-like material was produced, collected and analyzed [9][10][11][12][13][14]. Typical micrographic images of the as-produced soots are shown in Figure 1.…”

Section: Laser Synthesis Of Swnt-supported Catalystsmentioning

confidence: 99%

Fuel Cell Applications of Nanotube-Metal Supported Catalysts

et al. 2002

Self Cite

View full text Add to dashboard Cite

Novel carbon materials with nanometer dimensions are of potentially significant importance for a number of advanced technological applications. Within this report we describe the results for the electrochemical characterization of a series of single walled carbon nanotube (SWNT) metal supported catalysts as cathodes for basic fuel cell systems. Compared to the typical carbon black electrocatalysts, the nanotube supported platinum catalyst resulted in up to a 140% improvement in the efficiency for a proton exchange membrane (PEM) fuel cell.

show abstract

Formation of Single-Wall Carbon Nanotube Superbundles

Cited by 19 publications

References 14 publications

Hydrogen-Bond-Driven Assembly of Thin Multiwalled Carbon Nanotubes

Hydrogen-Bond-Driven Assembly of Thin Multiwalled Carbon Nanotubes

Stereochemistry of carbon nanotubes for electronic applications

Fuel Cell Applications of Nanotube-Metal Supported Catalysts

Contact Info

Product

Resources

About