Nanoflower

Nanoflower

A nanoflower, in chemistry, refers to a compound of certain elements that results in formations which in microscopic view resemble flowers or, in some cases, trees that are called nanobouquets or nanotrees. These formations are nanometers long and thick so they can only be observed using special equipment.

History

The first nanoflower was created in Japan and was actually the accidental outcome of an experiment on nanotubes.

Production

Production of nanoflowers is similar to the making of a carbon nanotube, although the most usual way to form a new nanoflower is to heat gallium (Ga) and then flow methane (CH4) over under specific pressure and heat. This induces silicon carbide (SiC) in formations that can be altered by the scientist and look like flowers. Another common way is by heating a molybdenum dioxide (MoO2) thin film on a piece of molybdenum foil surrounded by sulfur vapour.

Nanomeadow

In supercapacitors, energy is stored because the electrodes are coated with a porous material that soaks up ions like a sponge, usually activated carbon. Nanomeadow supercapacitors store ions in manganese oxide (MnO), a material with a much greater capacity for ions than activated carbon.

Research Institute of Chemical Defence in Beijing, China, and colleagues at Peking University created a nanomeadow of microscopic structures, fuzzy flowers of MnO each about 100 nanometres across on a field of messy carbon nanotube grass grown on a tantalum metal foil . As a result, the nanomeadow performs 10 times better than MnO alone and can store twice as much charge as the carbon-based electrodes in existing ultracapacitors.

See also

Footnotes

References

  • Summary of the 2nd E.E.F. (Enosi Ellinon Fysikon, Hellenic Science Society) Conference in Texnopolis Athens, Greece

External links

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