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Post by whiterose on Jun 1, 2007 7:54:41 GMT -5
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Post by skytroll on Jun 1, 2007 21:48:09 GMT -5
Very good article and coming from a good caring person.
skytroll
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Post by skytroll on Jun 1, 2007 22:59:38 GMT -5
porphyrin nantubes vs. carbon nanotubes " Porphyrins are light-absorbing molecules related to chlorophyll, the active part of photosynthetic proteins and light-harvesting nanostructures (chlorosomal rods). They are the active molecules in many other proteins such as hemoglobin, which gets its intense red color from a porphyrin. Porphyrin nanotubes are made entirely of oppositely charged porphyrin molecules that self-assemble in water at room temperature. The more well-known carbon nanotubes are formed at high temperatures and have covalent bonds between carbon atoms. Porphyrin nanotubes lack the high mechanical strength of the carbon tubes but possess a wider range of optical and electronic properties that can be exploited in making nanodevices. In fact, carbon nanotubes are often modified by attaching porphyrins to increase their utility. This is unnecessary for the porphyrin nanotubes, which can be tailored to specific purposes like water-splitting by varying the type of porphyrin incorporated into the nanotube itself to obtain the desired properties. Other porphyrin nanostructures such as nanofibers and rectangular cross-section nanotubes have been made and can also be used in the fabrication of nanodevices www.sandia.gov/news-center/news-releases/2005/images/nanotubes.jpgtinyurl.com/2p92k8First the teeth machine, carbon buckyballs(nanotubes) and now this. mmmmmmmmmmm Skytroll
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