Wednesday, February 07, 2007

US Patent 7172747 - Double Helix Metal Oxide Nanotube

Nanoparticulate materials have attracted much interest in the area of hydrogen storage (useful for fuel cells) due to the high surface to volume ratio of these materials. This patent from Japan Science and Technology Agency claims a newly discovered nanomaterial in the form of a double helix nanotube made of metal oxide material. Claim 1 reads:

1. A metal oxide nanotube consisting solely of a metal oxide that may contain hydroxyl groups, which is constructed in a double spiral and a hollow cylinder and has a hole diameter distribution containing two peak hole diameters ranging from 1 to 2 nm and from 3 to 7 nm.

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