carbon nanotubes
TRANSCRIPT
CARBON NANOTUBES
WHAT ARE CARBON NANOTUBES?
• Carbon nanotubes (CNTs) are carbon allotropes.
• Hexagonally arrangement of carbon atoms.
• Sp2 hybridised bonds.
• Diameter as small as 1 nm.
WHAT ARE CARBON NANOTUBES?
• It is nanoscopic in structure and in the shape of a hollow cylinder.
• Cylinders closed both ends by semi-fullerene(buckyballs) structures.
• Their name is derived from their long , hollow structure with the walls formed by one atom thick sheets of carbon , called graphene.
TYPES OF CARBON NANOTUBES
• Single-walled nanotubes (SWNTs)
• Multi-walled nanotubes (MWNTs)
Single-walled Nanotubes(SWNT)
• Most single-walled nanotubes have a diameter of close to1 nanometer , with a tube length that can be many millions of times longer.
Various types of SWNT
Multi-walled Nanotubes(MWNT)
• Multi-walled nanotubes consist of multiple rolled layers (concentric tubes) of graphite.
Multi-walled Nanotubes(MWNT)
There are two models which can be used to describe the structures of multi-walled nanotubes.
• In the Russian Doll Model , sheets of graphite are arranged in concentric cylinders.
• In the Parchment Model , a single sheet of graphite is rolled in around itself , resembling a scroll of parchment or a rolled newspaper.(The Russian Doll structure is observed more commonly)
ADVANTAGES
• Extremely small and lightweight.• Resources required to produce them are plentiful, and many can be made with only a small amount of material• Improve conductive, mechanical, and flame barrier properties of plastics and composites. • Enables clean, bulk micromachining and assembly of components
• Are resistant to temperature changes.
DISADVANTAGES• Despite all the research, scientists still
don't understand exactly how they work.
• Extremely small, so are difficult to work with.
• Currently, the process is relatively expensive to produce the nanotubes.
• At the rate our technology has been becoming obsolete, it may be a gamble to bet on this technology
POTENTİAL APPLİCATİONSSTRUCTURAL
•Combat jacket•Concrete•Sports equipment•Synthetic muscles•Bridge•Fire protection•Solar cells•Transistor•Superconductor
• Solar cell
POTENTİAL APPLİCATİONS
CHEMICAL
• Air pollution filter• Water filter• Biotech container
ELECTROCOUSTİC
• Loudspeaker
POTENTİAL APPLİCATİONS
MECHANICAL
• Oscillator
• Slick surface
• Thermal radiation
ELECTRICAL CIRCUITS
• Paper batteries
• Tiny computer chips
PAPER BATTERİES
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