Carbon nanohoms

The disappointing results for H storage in highly ordered CNTs may be saved with the emergence of carbon nanohorns. 

Because of low cost, high purity and high surface area CNHs become attractive candidates for gas and/or liquid hydrogen storage. Indeed, recently it was reported isosteric heats of H2 adsorption corresponding to 100-120 meV energy for binding 

Highly Ordered Fullerenes, Carbon Nanotubes, and Carbon Nanohorns 

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Fig. 10.17 Carbon nanohoms encapsulate the chemotherapeutic agent cisplatin. TEM image (a) and inverse contrast TEM image of cisplatin loaded into the nanohoms (b). The drug is held at the closed end of the nanotube according to the image in (c) (Ajima et al., 2006)...

Ajima K, Maigne A, Yudasaka M, Iijima S (2006) Optimum hole-opening condition for cisplatin incorporation in single-wall carbon nanohoms and its release. Journal of Physical Chemistry B 110 19097-19099. 

Ajima K, Yudasaka M, Murakami T, Maigne A, Shiba K, Iijima S (2005) Carbon nanohoms as anticancer dmg carriers. Molecular Pharmacology 2 475 480. 

Matsumura S, Ajima K, Yudasaka M, Iijima S, Shiba K (2007) Dispersion of cisplatin-loaded carbon nanohoms with a conjugate comprised of an artificial peptide aptamer and polyethylene glycol. Molecular Pharmacology. 4 723-729. 

Fan XB, Tan J, Zhang GL, Zhang FB (2007) Isolation of carbon nanohom assemblies and their potential for intracellular delivery. Nanotechnology 18 Art. No. 195103. 

Fig. 4.14 Carbon nanohorns with hydrogen condensed at the end of conical tip (a) agglomerate to form nanocarbon particles that exhibit rosette shape (b) TEM image credit http //www.phys-ics.siu.edu/migone/lab/carbon nanohoms.htm...

Fig. 3 Representative examples of carbon nanomaterials. Empty cage fullerenes (a) Cgo, (b) C70 endohedral fullerenes (c) La2 fA-Cgo, (d) Lu3N 4-C8o, (e) graphene sheet, (f) zig-zag single wall carbon nanombe, (g) arm chair single wall carbon nanombe, (h) chiral carbon nanombes, (i) carbon nanohom, (j) carbon nanoonion...

Meanwhile carbon nanohoms, a variation of carbon nanotubes, are being used in fuel cells to make them lighter, cheaper and more efficient. 

Hydrogen storage in carbon has been considered during the last few years on account of the existence of new carbon nanomaterials, such as fullerenes, superactivated carbons, carbon monoliths, carbon nanotubes, and carbon nanohoms [147,166,176-179], distinguished by their high adsorption capacities, hydrophobic nature, and high adsorption/desorption rates [170],... 

Wang H, Chhowalla M, Sano N, Jia S, Amaratunga GAJ. Large-scale synthesis of single-walled carbon nanohoms by submerged electric arc. Nanotechnology 2004, 15, 546. 

Collins, P.G., Bradley, K., Ishigami, M., and Zettl, A. (2000). Extreme oxygen sensitivity of electronic properties of carbon nanotubes. Science, 287, 1801—4. Ohba, T., Omori, T., Kanoh, H., et al. (2004). Intentitial nanopore change of single wall carbon nanohom assembUes with high temperature treatment. Chem. Phys. Lett., 389, 332-6. 

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