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Graphene is an infinitely alternating polycyclic aromatic hydrocarbon made of only six-atom carbon rings. It is described as being flexible, transparent, and having high elasticity and hardness. It also conducts electricity and heat well while having a low joule effect. Carbon nanotubes are cylindrical carbon structures measured in nanometers that have hexagonal units in a single-layer or multi-layer structure. They were discovered in 1991 and have excellent elasticity, thermal and electric conductivity, and mechanical resistance, making them suitable for uses such as solar cells, batteries, medical sensors and a proposed NASA space elevator project using carbon nanotubes.
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Grafeno
- 1. GRAPHENE
- 2. INDEX DESCRIPTION. ORIGIN AND HISTORY. SPECIFIC CHARACTERISTICS. USES.
- 3. DESCRIPTION hidrocarburo aromático policíclico infinitamente alternante de anillos de sólo seis átomos de carbono.
- 4. PROPERTIES FLEXIBLE AND transparent. Electric and termic conductivity. High Elasticity and hardness. Low joule effect.
- 7. DESCRIPTION Tubular or cylindrical carbon structures measured in nm. Structure : single layer and multiple layer. * Single layer: one graphene layer rolled. * Multiple layer: lots of graphene layer rolled concentrically. It’s a alotropic shape of carbon. Nanoshaped hexagonal units.
- 8. ORIGIN AND HISTORY In 1991 the resercher Sumio Lijima (Japan) descovered them. While he was watching through the microscope he found fibres deposited in a soot’s speck. Due to its shape they were called Carbone Nanotubes. They were multiple layer nanotubes. Two years after that lijima and Donald Lijima created one layer nanotubes.
- 9. PROPERTIES Elasticity. Thermal conductivity. It’s one of the most hard material known. Mechanic resistance. Chemically motionless and biologically compatible. They can be insulators and conductors.
- 10. USES Solar cells and storage of hydrogen. Production of automobile ligh pieces or space vehicles. Transistors. Production of rechargeables batteries, automobile pieces, sport articles, etc. Production of lithium’s ion batteries. To administer therapeutic heat, drugs and medical sensors to attack carcinogenic cells.
- 11. Disciplines that study its applications.
- 12. SPACE ELEVATOR NASA’s scientifics project. It would be made of carbon nanotubes. Due to its properties. Through this elevator spacial ships would go into the space. Economic improvement in spacial missions. http://www.youtube.com/watch?v=V9YGD1yVGxk