carbon nanotubes

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

04-10-750 HANDE ŞENYOL

04-10-502GÖZDE ORTATEPE