Nanotechnology

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Nanotechnology

  1. 1. NANOTECHNOLOGY
  2. 2. TOPICS INTRODUCTION COMMON TERMS CARBON NANO TUBES (CNT) STRUCTURES OF CNT MANUFACTURE OF CNT APPLICATIONS OF CNT
  3. 3. INTRODUCTION
  4. 4.  The term ‘Nanotechnology’ is derived from the Greek word ‘nanos’ and ‘dwarf’ The prefix nano in the word ‘Nanotechnology’ mean billionth (1 x 10-9 m) The design, characterization, production and applications of structures, systems and devices by controlling size and shape at 10-9 m scale or the single –atomic level.
  5. 5. COMMON TERMS Nanoparticles: The size of the particles which ranges from 1-50 nm Nanomaterials: materials having size less than 100 nm atleast in one dimension Nanotube: Nanometer scale tube like structure Nano manufacturing: methods for producing nanostructures in reliable and commercially viable ways
  6. 6. HOW DO WE SEE NANO PARTICLES ? Scanning electron microscope andtransmission electron microscope are usedto see the Nanoparticles
  7. 7. CARBON NANOTUBES (CNT)
  8. 8. Carbon nanotubes are allotropes ofcarbon with a nanostructure having alength-to-diameter ratio greater than10,00,000. when graphite sheets arerolled into a cylinder, their edges joinedand form carbon nanotubes i.e., carbonnanotubes are extended tubes of rolledgraphite sheets.
  9. 9. STRUCTURES OFCARBON NANOTUBES
  10. 10.  SINGLE WALLED NANOTUBES MULTI WALLED NANOTUBES
  11. 11. SINGLE WALLED NANOTUBES  It consists of one tube of graphite. It is one atom thick having a diameter of 2 nm of a length of 100 x 10-6 m.  Structure of single walled CNT ‘s are:  Armchair structure  Zig – zag structure  Chiral structure
  12. 12. MULTI WALLED CARBON NANOTUBES It consists of multiple layers of graphiterolled in on themselves to form a tubeshape.
  13. 13. MANUFACTURE OF CNT PYROLYSIS LASER EVAPORATION CARBON ARC METHOD CHEMICAL VAPOUR DEPOSITION
  14. 14. PROPERTIES OF CARBON NANOTUBES Carbon nanotubes are very strong and highly flexible Cnt’s withstand extreme strain and tension It has very high electrical conductivity It has very high thermal conductivity CNT atoms are continously vibrating back and forth
  15. 15. APPLICATIONS OFCARBON NANOTUBES
  16. 16.  CNTs in storage devices Detection of gases using CNT CNT in integrated memory circuits CNT as protective shields Air and water filtration using CNT CNT in ultra capacitor
  17. 17. THANK YOU

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