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.[1] These formations are nanometers long and thick so they can only be observed using electron microscopy.[2]
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[edit] Production
Several ways to produce nanoflowers are known:
- A process similar to the making of a carbon nanotube using a hydrocarbon gas.
- Heating gallium (Ga) and then flowing methane (CH4) over, under specific pressure and heat. This forms flower-shaped silicon carbide (SiC) structures.
- Heating a molybdenum dioxide (MoO2) thin film on a piece of molybdenum foil surrounded by sulfur vapour.[3]
[edit] 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.[4]
Scientists at Research Institute of Chemical Defence (Beijing, China) and 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. Nanomeadows perform 10 times better than MnO alone and can store twice as much charge as the carbon-based electrodes in existing ultracapacitors.[4]
[edit] See also
[edit] Footnotes
- ^ "Silicon carbide nanoflowers bloom - nanotechweb.org". nanotechweb.org. http://nanotechweb.org/cws/article/tech/19739. Retrieved 2008-06-18.
- ^ Kalaugher, Liz. "Nanoflowers: Science Videos - Science News - ScienCentral". www.sciencentral.com. http://www.sciencentral.com/articles/view.php3?type=article&article_id=218392630. Retrieved 2008-06-18.
- ^ Kalaugher, Liz. "Nanoflowers blossom in place of nanotubes - nanotechweb.org". nanotechweb.org. http://nanotechweb.org/cws/article/tech/17264. Retrieved 2008-06-18.
- ^ a b http://technology.newscientist.com/article/dn14753-can-nanoscopic-meadows-drive-electric-cars-forward-.html
[edit] References
- Summary of the 2nd E.E.F. (Enosi Ellinon Fysikon, Hellenic Science Society) Conference in Texnopolis Athens, Greece
[edit] External links
- Tyrrell, James. "Interference fringes create sensing template - nanotechweb.org". nanotechweb.org. http://nanotechweb.org/cws/article/tech/34585. Retrieved 2008-06-18.
- Photo of nanoflower
- "The ‘nanoflower’ breathalyzer « Neurophilosophy". neurophilosophy.wordpress.com. http://neurophilosophy.wordpress.com/2006/09/06/the-nanoflower-breathalyzer/. Retrieved 2008-06-18.</ref>
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